Best COB LED Grow Lights – Full 2019 Review

COB LED grow lights are regularly outperforming normal LED grow lights of similar wattage. The best COB LED Grow lights can compete with normal LED grow lights with 10% higher wattage output.

The lights I review in this article are the best cheap COB LED grow lights. I also reviewed the strongest COB LED grow lights here if you’re curious about more high end COB LED models.

Many people are switching to LED grow lights from high pressure sodium or metal halide grow lights. But one very important question to ask yourself is if you should spend a tiny bit extra and opt for a COB LED grow light.

Before I list the best COB LED grow lights, I put together a summary table and some basic information for your convenience:

It’s latest updated version for choices to make in 2019 that could help you well in getting better results.

What’s a COB LED?

COB stands for Chips On Board – it doesn’t do a good job implying the benefits or differences of a COB light. To understand the working mechanism, it’s important to know the exact characteristics of COB LED Grow lights.

There is a saying “Unity is Strength”. That also holds true for LEDs. The only difference between a COB LED and regular LED is the design. COB LEDs fit more LEDs onto a single chip, allowing for higher intensity and lower power consumption.

A more technical explanation of a COB LED is a “technique of electronic packaging where multiple chips will be bonded together on a single substrate surface to produce intense light.”

Advantages of COB LED Grow Lights

  1. They provide much denser and intense light compared to other standard “SMD” LED Grow lights. It’s due to the packaging of multiple LEDs on a single large-sized chip.
  2. As the source of light will be centralized in COB technology, it will generate lesser heat compared to traditional light sources.
  3. Lower electricity consumption is one of the great benefits from COB lights since it operates on a single diode which will be combined with multiple diodes.
  4. Much more modular design for the panel is possible in COB grow lights.
  5. COBs are more reliable as far as lifespan is concerned.
  6. COBs are capable of spreading light which can be easily absorbed due to higher penetration rate.
  7. Less light loss is one of the great thing about COB LED Grow Lights. Provide your plants with a quality light that is usable up to the maximum extent.

Drawbacks of COB LED Grow Lights:

  1. Overall the technology is better than standard LED grow lights. The downside can be if you’re on a budget, because these lights generally cost a bit more than standard grow lights. As they say, you get what you pay for. In the end it’s totally worth it because you’re getting a better spectrum and higher light intensity.

How COBs are better for Indoor Marijuana Cultivation?

As we always state in our buyer’s guide regarding indoor weed cultivation, one vital element for your plants includes light quality with essential bands, a well-balanced environment in grow space, regular watering, and fertilizers for nutritional benefits.

Many of the more modern and high quality COB LED lights have white wavelengths in their spectrum. The white spectrum is made up of green, yellow and orange wavelengths. Studies have found that adding white spcetrum to Red and Blue wavelengths increased growth in tomato plants by 12-16%.¹ So COB LEDs produce a comparatively better light spectrum compared to normal LED grow lights.

The design of the diodes being closer together enables the output to be more powerful and more energy efficient. Many COB LED grow lights also include an intensifying lens that greatly increases PPFD readings. Regular LED grow lights can’t use these because the LEDs are scattered around compared to bunched together.

Side by Side Comparison: COB LED vs Normal LED:

Because the COB LEDs are more intense, they naturally have a stronger PPFD value. Below we compare the PPFD value for two equal watt output LED grow lights. One is normal LED, the other is a COB LED.

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Both are well known LED grow light brands – King Plus and Meizhi. You can see the King Plus 600w normal LED has a PPFD value of 430 umol at 18 inches. Incredibly, the Meizhi 600w COB LED light has a 61% higher PPFD reading at the same height! That’s 694 umol at 18inches. There is simply no contest.

Factors to Consider While Buying a COB LED Grow Light

In this era of a competitive market, many manufacturers are claiming that their products are capable of creating wonder in your grow space. However, very few are right on their claim, and you shouldn’t spend your money in vain by trusting such fake claims.

  • Stay away from unknown or fake brands.
  • Look for real quality and capability of a panel, mainly via PPFD reading.
  • Don’t compromise on quality due to budget. There are budget-friendly options available for you which can provide real light. However, you might have to compromise on coverage area or other expectations but go for one which can provide real quality
  • Consider actual power draw as a primary concern instead HPS replacement. Yeah, those replacement figures are useless.
  • Hunt for the best COB LED regarding the build.
  • If you’re paying high expect some premium features such as waterproof build, built-in timer, wi-fi controller etc.

To help you with selecting the best and avoiding fake claims our team sorted around 10 top rated Real COB LED Grow lights for your marijuana cultivation. Yeah, these are the LEDs you can rely on.

Hope you’ve got all the points listed above.

Review of Best COB LED Grow Lights on the Market

Here we have reviewed top 10 Chip On Board (COB) LED Grow Lights for you. Take a look.

Growstar 150W UFO COB LED – Grow Light For Beginners




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Compact in size yet works like a beast inside your growing box. Yeah, the very first light that we’re going to review is from Growstar. You might have heard its name as it’s quite famous for performance and quality light.

The Growstar 150W COB LED grow lights features a UFO style of lighting and comes in circular body shape. This COB variant of Growstar is an upgraded version of their traditional LED Grow Light.

To provide their customers with satisfying performance and a high quality lighting solution Growstar integrated a CREE COB chip which is featured in the center of the light panel.

Apart from a single centralized 30W CREE COB they equipped several standard 3W bridgelux/epistrar chips.

The unique selling point of this grow light is the size which provides a lot of flexibility. You can buy one or two as booster units for your existing setup without draining your wallet. Or you can buy more and get good full spectrum coverage at a decent price. Growstar offers two versions, a 150 watt and 300 watt – both very affordable.


The spectrum from these lights is pretty balanced and includes a good amount of red and blue – exactly what you need to get your plants through each phase of growth.

One impressive feat of this COB LED grow light is Growstar was able to include both ultraviolet (UV) and infrared (IR) wavelengths in such a small light. If you’re growing cannabis you know these wavelengths are essential if you want high quality bud, as they’ve been shown to increase THC (UV), accelerate the flowering phase, and increase bud density (IR).


This is the lowest cost COB on the market, and the 150w output is low as well. So I’d recommend using this COB grow light as a “booster” in combination with other lights, or you can buy 4 units hanging at 12″ to cover your 4×4 grow tent thoroughly.

Even though Growstar claims 2×2 ft coverage, the intensity isn’t going to be there at this output, so I seriously recommend doubling up to 1 unit per 1×1 foot of space. At the very low price of this light, “doubling up” really isn’t that crazy to consider, and puts you in line with other COB LED lights cost wise.

Another option would be to purchase to the 300 watt variant. For a 4×4 grow tent you should buy 2-3 of those units for the same cost or less than the four recommended 150 watt units.

Just remember thorough and intense coverage is key when growing indoors. You can’t expect one single 150 watt or even one single 300 watt to get the job done for a 4×4 grow tent unless you’re growing one single plant. You will absolutely get what you pay for with grow lights.

Power Consumption, Cooling & Warranty:

Growstar COB LED also helps you save your money in the long run by utilizing a mere 62W from the wall for its functioning.

You’ll notice a high speed and silent cooling fan on its backside, which helps in keeping your plant’s surroundings fresh and cool.

In rare cases like with most grow lights, failure will occur and Growstar is always there to back you up with their high-quality customer service. They offer a 30 days money back guaranty for unsatisfied users and 2 years of warranty.

It’s one of the best cheap LED suitable for indoor marijuana cultivation in COB technology.

Customer Feedback:

You don’t need to believe me when I say this is one of the best cheap COB LED grow lights. Thereviews of existing users speak for themselves. What I’ll say in reading through dozens of them is that overall satisfaction is very high.

Customer service is also very good. One user had an issue with their light and was promptly sent a new one by Growstar. It really made them feel like a valued customer and they ended up ordering more.

Click here to see reviews and prices for the Growstar 150W on

Pros and Cons of Growstar 150W COB LED Grow Light

  • Fair Price for people with tight budget
  • Centralized placement of CREED COB for focused light
  • Intense and brighter light
  • Full spectrum output including UV and IR
  • Small size allows flexible usage as a “booster” light, or with multiple units for a larger area
  • Energy afficient as consumes less power
  • Quiete and cool operation
  • Cultivator oriented support and service
  • Not daisy chainable
  • Barebones light with small coverage area, unless you buy more than one.

Specification Details of Growstar 150W COB LED Grow Light

  • Dimensions : 6.9” x 2.4”
  • Weight : 2.1 lbs
  • Spectrum : Full spectrum Along with Hint of IR
  • Actual Power Draw : 62W
  • Coverage : 1’ X 1’
  • Voltage : 100V – 240V
  • Lifespan : 50000 Hours
  • Warranty : 2 Years Service and support

Click here to see reviews and prices for the Growstar 150W on

ParfactWorks 1000w BM4 CREE COB LED Grow Light

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CREE is the best of the best when it comes to LEDs. As an example, the Mars Hydro Pro II 1200 watt light using CREE chips is 3x stronger than the 1600w Epistar model. Go figure.

This light is from Parfactworks, it also features full spectrum CREE COBS mixed with SMD LEDs.


The Parfactworks 1000W features twenty 3000K white CREE COBs and 52 SMD LEDs on its panel.

Centralized COBs improve uniformity, and luminous efficiency of this grow panel. You might have noticed that luminous efficiency and spectral uniformity is the main factor behind boosting the growth and health of your plants during vegetation as well as during blooming.

There are two switches on this light – one to turn on/off the COBs and the other for the SMD LEDs.

It also features a daisy chaining port where you can attach another grow light without the need of an extra socket in your power outlet.


Parfactworks BM4 COB is a true full spectrum COB LED Grow light. Too many lights these days claim full spectrum without containing all the necessary wavelengths.

The Parfactworks grow light has every wavelength from ultraviolet (UV) up to infrared (IR). Moreover, a well-balanced ratio of blue and red color makes the Parfactworks grow light an easy buy in my books.

This light is suitable for all kind of plants and all the phases of a plant’s lifecycle.


Parfactworks says the 1000w model will cover 4×4. They don’t provide a PPFD coverage chart so I can’t confirm, although I know the CREEs put out serious light intensity so I wouldn’t doubt this light is good for at least 3×3.

If you need more or less coverage you can always check out the 500w and 1500w models as your needs require.

Power Consumption, Heat & Warranty:

This light consumes only 380 watts from you wall which is pretty impressive for a 1000 watt light.

Well managed heat dissipation system in the Parfactworks 1000w COB ensures safety and stability of your marijuana plants throughout its lifecycle. The 1000 watt model comes with 4 cooling fans. All the reviews are perfect rating and nobody has complained of heat issues so far.

To provide their customers with a hassle-free and worry less experience of indoor weed cultivation Parfactworks offers 3 years warranty and 30 days money back.

Customer Comments:

Reading through the reviews I found that existing owners are quite pleased with this light, which makes it a great bargain. There are only a handful of reviews so far, but they’re all near perfect ratings and the owners seem pretty enthusiastic about these Parfactworks lights.

If you’re concerned with features and budget but don’t want to compromise on either of them, then the Parfactworks 1000W CREE COB LED Grow Light is for you.

Click here to see reviews and prices for the Parfactworks 1000W COB on

Pros and Cons of Parfactworks 1000W CREE COB Full Spectrum LED Grow Light

  • Attractive and elegant design
  • Attractive price
  • Full spectrum output
  • Highly effective light for blooming
  • Massive coverage area
  • Fabulous Energy efficiency
  • Daisy chaining ability for expansion options
  • Top rated heat dissipation system
  • Quality support for worry free growing experience.
  • PPFD chart not provided, but we know CREE LEDs put out very strong light.

Click here to see reviews and prices for the Parfactworks 1000W COB on

Phlizon 2000w COB LED – A Powerful Choice

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Phlizon is another well known LED grow light manufacturer. They have several COB LED light options ranging from 1000w to a monstrous 3000w output.

One unusual feature on a high output light like this is the daisy chain capability. Typically that feature only comes on lower output lights as you can only run so much current through the daisy chain outlet. But with this light you’ll have that daisy chain option.

Spectrum, PPFD, and Coverage Area:

The 2000W variant has the following LED distribution:

It contains 4 COB LEDs, 68 x 630-660nm LEDs, 10 x 470nm, 6 x 6500k, 4 x 3000K, 4 x ultraviolet LEDs, 4 x infrared LEDs.

That mixture helps create an equal balance of red and blue light, perfect to carry your plants through all phases of growth.

The included UV and IR diodes are absolutely essential if you want to grow high quality cannabis. Ultraviolet is known to increase THC, and infrared is known to accelerate the flowering phase as well as increase bud density.

Upon further inspection you’ll notice the full PAR/PPFD measurement at 18″ is 2161 umol/m²s. You just don’t see readings like that on normal LEDs yet many of them are in the same price range. Talk about value.

Now comes the critical part and we all know that it couldn’t be anything else other than coverage ability. The Phlizon 2000 watt COB is capable of putting a smile on your face by covering 4.1’ X 4.1’ of grow space comfortably. With that PPFD value you may even be able to stretch it a bit further.

Power Consumption, Heat and Warranty:

You might be concerned about all those LEDs costing you on your utility bill, but you’d be wrong. This LED Grow light pulls only 451W from the wall.

To keep things under control and environment well-balanced this grow light is equipped with four cooling fans, and aluminium heat sink works like a charm. No owners have complained about heat thus far, and one mentioned the heat dissipation was very good.

In a rare case, if any failure occurs then Phlizon is there to back you up with their quality support. Phlizon provides a 2 year warranty.

Customer Comments:

I read a ton of comments from owners of the Phlizon COB lights.

Current owners have said the Phlizon 2000w kicks ass. A few reviewers who have owned several lights compared the Phlizon 2000w to another popular brand, the Optic LED Gen 3 Optic 4. They said the Phlizon has now replaced the Optic LED as their favorite light. The Optic LED costs hundreds more for a similar output.

Looking at quality, capabilities, and user response I’d definitely recommend you check out the Phlizon 2000W COB LED grow light for a tremendous growing experience.

Click here to see reviews and prices for the Phlizon 2000 watt COB LED grow light on

Pros and Cons of Phlizon 2000w COB LED Grow Light

  • Modular and effective design.
  • Well placed CREE COBs.
  • Full spectrum ability.
  • Best PPFD values in the segment.
  • Highly Effective Light.
  • Massive coverage area.
  • Cost Savvy from energy consumption point of view.
  • Keeps temperature balanced.
  • Easy to replace modules.
  • Not waterproof.
  • No remote control.

Meizhi 300W Full spectrum COB – Compact yet powerful

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This COB LED grow light is from MEIZHI. MEIZHI is famous for its budget-friendly and quality oriented product. They claim to spend more on product development and customer service.

Spectrum, PPFD and Coverage Area:

To create an optimal spectral effect for betterment in your plant’s progress and growth it is equipped with a single CREE COB in the center surrounded by multiple small-sized LEDs for better light quality.

If you’re a spectrum lover, then you’d be glad to know that it offers a complete full spectrum of light, although MEIZHI has kept more frequency of red wavelength in this grow light.

With a decent PPFD value of 417 uMol from 18” is decent for a light with this power. To achieve this, the Meizhi 300w COB LED

It’ll only pull around 130 watts from your outlet.

How many Meizhi 300 watt for a 4×4 grow tent?

Meizhi claims their 300W Full spectrum COB Grow Light covers 3.5’ X 3.5’, but I recommend using it for a smaller area based on the 417 uMol PPFD. I would suggest 2x2ft max for each 300 watt light in order to get sufficient usable intensity for your plants. So you’d need 2 for a 4×4 grow tent, and you’ll be getting an acceptable level of light in that scenario.

Its daisy chainable so if you’re looking to use this light to cover a larger space, you can connect multiple lights. You can always upgrade to the 600 watt version too. You’ll notice a secondary power socket on the back side of your COB Grow Light right beside cooling fan for the daisy chain connection.

Dimmers or mode switches are missed in the build, but at this price range it’s acceptable.

Meizhi says damage and warranty claims are very low. But if you still have an issue with their product, they’re there to back you up with their support. A 3 year warranty is being offered with this grow light.

Click here to see reviews and prices for the MEIZHI 300W on

Pros and Cons of MEIZHI 300W Full Spectrum COB LED Grow Light

  • Affordable COB Grow Light on the market
  • Brand is known for budget friendly yet quality products.
  • A Full spectrum brightness
  • Decent coverage capability especially if daisy chained
  • Highly power efficient
  • Daisy Chainable
  • Worry-less experience with 3 years local support.
  • Not waterproof
  • Don’t feature any dimming nob or mode switch

Looking at commitment towards quality and highly satisfied customer base in their regular LED Grow Light products, we can imagine the power and performance of this Best Budget COB LED Grow Light.

Yeah, from our side it’s a thumbs up for deciding to buy a Meizhi 300W COB LED Grow Light.

Click here to see reviews and prices for the MEIZHI 300W on

Roleadro  800w COB LED grow light

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Roleadro succeeded in gaining the trust of the people in their products with their old 400W COB variant. This is the latest upgraded version COB grow light from Roleadro. To make it more awesome, they’ve upgraded their previous version with improvements in light quality, COB placement, Spectral abilities and coverage space capabilities.

Roleadro 800W COB is equipped with CREE COB chips on the board. These COBs are further supported by a 90 degree reflector which improves intensity and produces evenly distributed light.

Roleadro claims that it has a higher PPFD and lumen value compared to other similar COB LED Grow Lights, although they don’t provide a specific reading which is an obvious negative. Looking at user responses they seem to be satisfied with the light nonetheless.

Spectrum and Coverage:

Roleadro’s upgraded version features a full spectrum and comprises all the essential bands of shades in its lighting. However, no mention for UV or IR is found anywhere for this grow light.

With an ideal wavelength of the spectrum ranging in 380nm-780nm, it becomes suitable for all phases of your indoor plants’ life cycle.

Not knowing the PPFD value, I can’t recommend the light for more than 2’ X 2’ foot coverage.

Above all, it’s daisy-chainable so you can attach another grow light with it in no time without the need of extra wall sockets or extension cables.

Power Consumption, Heat & Warranty:

If you’re more concerned about power efficiency, then it is an ultimate power saver and helps you in saving much on the electricity bill in the longer run. The Roleadro 800w COB LED grow light will pull around 200W from your outlet.

To avoid the hassle of purchasing supplementary inline fans and another cooling system, Roleadro 800W COB LED grow light is equipped with multiple cooling fans and a well-researched radiator system.

30 days money back guarantee and 2 year warranty ensures a worry-free indoor gardening experience with this one of the best COB LED grow light on the market.

Customer Support and Comments:

A majority of reviewers seem to be pleased with the light. They’ve mentioned low heat and good yields. Many own multiple units for their grow spaces, so like I mentioned for coverage you’ll probably need more than one unless you have a small space. Other than that, I’d say it’s worth the shot based on customer satisfaction.

A few people did run into issues with their lights and I was happy to see Roleadro reached out to them. Many people updated their reviews saying they received free replacements. This is the type of customer service you’d want, especially for a grow light.

Click here to see reviews and prices for the Roleadro 800W COB LED grow light

Pros and cons of Roleadro upgraded 800W COB

  • Very affordable COB LED grow light
  • Decent coverage
  • A full spectrum effect
  • Best in the segment coverage area
  • Modular design with secondary optical lens
  • Daisy chainable to let you expand grow space in future
  • Marvellous cooling ability and heat dissipation system
  • Satisfaction oriented customer service and support
  • No UV/IR spectrum.
  • It’s not waterproof.

Canagrow Newest 360W COB – Unique in All Aspects

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This is a fanless new and advanced version COB LED Grow Light by Canagrow. It’s definitely struck my interest, and it should strike yours too. Canagrow seems to be disrupting the COB LED grow light market by making their light thinner than all others.


You don’t see disruptive innovation too frequently on this market for some reason, although Canagrow has taken a totally different direction. It’s obvious in this 360w COB LED grow light’s design. Canagrow uses a heat resistant coating and a unique aluminum alloy heat sink. It’s hard to believe but take it from the customers who’ve given this COB LED grow light a damn near perfect review rating.

This grow light features 4 high-quality COB chips, each 100 watts. These are high quality chips manufactured in South Korea. These COBs are similar to CREE CXB3590 COBs up to the some extent. However, it’s not CREE CXB3590 COB LEDs.

Body build and materials are anti-rust, as well as dust and moisture proof, eliminating the need to constantly clean the grow light.

Unfortunately the thin design comes with one sacrifice being you cannot daisy chain this grow light.

Spectrum and Coverage:

As far as spectrum is concerned, it includes universal White, Red and Blue colors along with UV and IR elements. But I’ll note the blue spectrum could be a bit better on this light. It’s a lot heavier in the green and red department. Canagrow states that it’s a full spectrum LED Grow Light.

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The Canagrow Newest 360W‘s coverage is enough for a growing space of 2.5’x2.5’. I’d put two of these in a 4×4 grow tent. One owner reported having one of these plus one other 600 watt light in their grow tent and it’s all they need.

Unfortunately Canagrow doesn’t offer PPFD test results for this light, so it’s hard to guage how well it stacks up against others.

Power consumption, Heat and Warranty:

The CanaGrow 360 watt COB grow light only pulls 120w from the outlet.

It comes with a 30 day hassle free return, and a 3 year warranty.

Customer Comments:

Reading through dozens of reviews I found that purchasers of this light were really satisfied when used properly. One person was concerned about the heat since the light doesn’t have fans, but ultimately it wasn’t an issue for them.

Reading through other comments it seems roughly 2ft by 2ft (give or take) is the ideal coverage area for this light.

One person found the Amazon product description a bit confusing. To clarify, these are not CREE CXB3590 COBs. CanaGrow uses a Korean COB chip they claim is equivalent to the CREE CXB3590. 

Click here to see reviews and prices for the Canagrow Newest 340W on

Pros and Cons of Canagrow Newest 340W COB LED Grow Light

  • Slick and attractive design
  • Thin body and compact in nature
  • Great spectral abilities
  • Well functioning and high quality COBs
  • Intense and denser light array
  • Decent coverage
  • Elimination of fans and inclusion of high and low slot black coated cooling structure.
  • Lower power consumption
  • Long warranty
  • No Dimmer or daisy chain.

Click here to see reviews and prices for the Canagrow Newest 340W on

BloomBeast 520W COB LED Grow Light

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This is the 520w COB LED grow light from BloomBeast. We’ve reviewed their other grow lights and found them to be very capable – this model is no different.

BloomBeast has been around since 2010. You may imagine they have considerable expertise and experience in manufacturing well-suited Grow Lights for indoor plants.

An eye-catching design and a panel built using high-quality material makes it outstanding comparably.

Let’s explore this BloomBeast grow light in depth to understand the benefits and why you should take one home if it suits your needs.

At a very first glance, you’ll notice 84 COBs at 5W each plus one 100w on the middle of this Bloombeast COB Grow Light. The lights are completely dimmable so you can adjust for any stage of plant growth.

This mechanism is implemented on the COB placement to achieve a highly uniform and denser array of light. Moreover, it also helps in getting highly optimized coverage and avoids hot spots or waste of energy and light.

With two separate fully functional and inherently user-friendly dimmer nobs it gives you the comfort of adjusting light quality and brightness according to the current stage of your marijuana plant’s lifecycle.

Standard LED drivers make it a reliable and durable COB LED Grow Light for more prolonged use.

Spectrum, PPFD, and Coverage Area:

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People wondering about the BloomBeast’s spectrum quality would be happy to know that BloomBeast 520w COB Grow Light spreads a 13 band full spectrum light mixture of red, blue, UV, IR and white LEDs.

The BloomBeast 520 watt will comfortably provide 1250 uMol in the center coverage area, and 500+ in the outer to mid coverage area. Perfect to get you a solid yield from your plants.

It’ll cover around 3’ X 4’ of grow space effectively. However a strong PPFD reading will enable you to hang it a bit higher if so desired. You can get away with using only one of these in your 4×4 grow tent. Maybe throw in a  cheap full spectrum Growstar UFO booster to be sure.

Power Consumption, Heat and Warranty:

From power efficiency point of view, it’ll pull more or less 210W from the wall based on the setting of dimmers. Not bad for a light putting out 520 watts.

Tired of your current heat blowing grow panel? The BloomBeast 520W COB LED Grow Light features multiple cooling fans and is fitted with a nice heat dissipation system.

It’ll keep your grow space well balanced and will prevent any harm to your plants.

If you face any trouble Bloombeast is there to back you up with their professional support for a substantial time frame of 5 years. This is the best warranty on the grow light market and it’s one of the reasons we love this Bloombeast.

Customer Comments:

I’ve researched reviews of people who’re using the Bloombeast 520w COB LED grow light for at least 6 months. They’ve commented positively on the cool quiet operation of the light. Others admire the seedling/veg/bloom switches as well as canopy coverage.

Click here to see reviews and prices for the BloomBeast 520w on

Pros and Cons of BloomBeast 520w COB LED Grow Light

  • Top Notch build
  • Great quality of COBs
  • 13 Band Full spectrum Along with white, UV and IR light.
  • Denser and effective light for achieving better results in terms of yield
  • Suitable for all phases of growth.
  • Massive Coverage
  • Separate dimming switches
  • UL Certified Drivers
  • Well placed cooling fans
  • Best on the market 5 year warranty
  • Not waterproof
  • Needs safety glasses to prevent harm to vision of human eyes.

Click here to see reviews and prices for the BloomBeast 520W on

Canagrow CREE CXB3590 200W COB – Modern COB For Indoor Gardening

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Here’s another best COB LED grow light from Canagrow. With the placement of the latest CXB3590 CREE COBs on the panel Canagrow has something fabulous to offer to you regarding performance and capabilities.


It is equipped with 2 massive CXB3590 CREE Chips capable of providing you with a 400W equivalent light.

Canagrow 200W COB LED uses some advanced techniques of LED packaging on the board and improves the quality of light.

Canagrow 200W COB features a highly durable optical lens on its front side. This optical lens improves coupling efficiency and boosts the light transmittance up to 97%. Yeah, that’s an incredible thing concerning Canagrow CXB3590’s light intensity and brightness.

Thanks to the professional research team and long-term thinking of Canagrow, if you need to replace a COB Chip in future you can replace it manually with the weld free design.

Functioning of this Canagrow CXB3590 200W COB is at its best due to high quality LED drivers from MeanWell. This COB LED grow light is waterproof which is a rare feature in the LED grow light market. That’s one reason we chose it as one of the best COB LED grow lights.

Daisy chaining capability will help you to expand coverage area in the future.

Spectrum and Coverage Area:

Spectrum quality of this Canagrow COB LED Grow light is defined by a wavelength range of 380nm-780nm. It’s a full spectrum LED grow light by Canagrow.

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As far as the illumination area is a concern, Canagrow CXB3590 COB LED can help you to achieve a decent footprint for around 16 sq ft. You can count on it for a 2’ X 2’ of grow space. Canagrow suggests hanging these grow lights at 1~1.2 meters in the seedling stage, 0.8~1 meters in the growing stage, and 0.5-0.8 meters at the flowering stage.

CanaGrow doesn’t provide PPFD readings for this light, although based on the specs it should be enough for a 2x2ft space as previously mentioned.

Power Consumption, Heat dissipation & Warranty:

Moreover, if you’re curious to know its power draw, it only draws around 200 watts from the wall.

However, it has a dimming nob from where you can adjust the amount of light according to your plant’s needs. Yeah, it also helps in decreasing actual power draw up to some extent.

For cooling and heat dissipation, this Canagrow CXB3590 COB Grow Light is equipped with two cooling fans.

If you’re planning to use multiple LEDs inside a single grow tent, I’d recommend to supplement your grow space with an inline fan or some good quality exhaust system.

Their professional support will tackle all your problems smoothly for a term of 3 years. Also, they also offer a 30 days refund policy which ensures that they’re offering something fabulous enough to be confident.

Check out some customer photos:

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What’s the difference between this 200w COB LED from Canagrow and the 360w model reviewed earlier, since the price is almost the same?

This is a popular question from some people, and the answer is COB LED type. The 360w model has off-brand korean made LEDs with a low-heat design, while the 200w model has top shelf CREE LEDs that require fans for cooling.

I’d estimate the intensity emitted by CREE LEDs is 30% higher than other brand LEDs. I know that because on the Mars 1200w CREE, it emits much more intense light than the Mars 1600w bridgelux.

Both of these Canagrow lights have very good reviews but the main difference is like buying name brand or generic.

Customer Comments:

Canagrow is offering reliable and trustworthy products to indoor cultivators and hydroponic enthusiasts, regardless of their specification needs.

You don’t have to take it from us, simply turn to the satisfied customers who leave great reviews for Canagrow COB LED grow lights.

Some of the glowing reviewers say how they wish they could trade all their lights for this model. Another one said they are blown away and 100% recommend.

Combine those reviews with product quality and you won’t be let down if you purchase this light. I recommend Canagrow CXB3590 COB LED grow light to people with an average coverage expectancy of 4’ X 4’ and power draw expectancy around 200W. This is one of the best COB LED Grow Light for your marijuana plants.

Click here to see reviews and prices for the Canagrow CREE CXB3590 on

Pros and Cons of Canagrow CXB3590 COB LED Grow Light

  • Fabulous in terms of build
  • Non-welded COB Holders for easy replacement of COBs
  • Marvellous spectrum and brightness
  • Well balanced Red:Blue ratio.
  • Decent Coverage and PPFD Values
  • Dimmable COB LED Grow Light
  • Daisy Chainable
  • Effective Cooling
  • Durable LED Drivers from MeanWell
  • Longer Lifespan.
  • Professional Support for 365 Days of the year
  • Keep it away from dripping water
  • It don’t have timer or any other remotely operating controllers.
  • A bit pricey but it is worth it.

Click here to see reviews and prices for the Canagrow CXB3590 on

Maxbloom 400W X4 Plus COB LED Grow Light – Best for Indoor Cannabis Growing

best led grow lights


Maxbloom has been in the grow light market for over 10 years. Their X series is their 8th generation lighting product.

You can imagine how much refinement has gone into their products by this point, and that’s why we’ve included it in our list of best COB LED grow lights.

As an established brand on the market they know what people expect from their products and what’s best for indoor growing solutions.


The Maxbloom X4 plus COB LED grow light features 48 LEDs at 5W each and 2 massive sized CREE XTE COB Chips in the centre each of 100W.

Yeah, it’s a combination of LEDs and COBs, and that’s what makes it a magical piece for indoor growing. Maxbloom’s intention was to supply their customers with one of the Best COB LED Grow Light for indoor growing.

It comes with two separate dimming nobs on the side from where you can adjust light effectiveness and brightness according to your plant’s growing phase.

Maxbloom 400W COB features a modular design for easy maintenance and replacement of plants. Yeah, you can easily replace COBs on your own if needed.

Spectrum, PPFD, and Coverage Area:

Maxbloom X4 Plus features a true 12 band full spectrum light including infrared (IR) which helps in boosting the leaf building process of your plants. You can see in the image below, it’s a nice balance of red and blue. That’ll easily carry you through all phases of plant growth.

This COB LED grow light will provide solid coverage of about 3’x3′ at 24″, and you can always upgrade to the 800 watt model if you need more.

Power Consumption, Heat and Warranty:

Maxbloom X4 plus pulls around 200W of electricity from the wall. However, it depends on your use. 200 watts is the power draw for maximum utilization of the light by turning both veg and bloom nobs to the maximum.

If you’re serious about cooling and temperature and don’t want to bring a heat blowing COB home then MaxBloom is for you as it is equipped with multiple cooling fans to keep it constantly cool. In reading comments from owners, I haven’t seen any complaints about heat with this light.

Even in future if you run through any failure, you can contact MaxBloom for 5 years. Yeah, they’ll help you in resolving your issue.

Click here to see reviews and prices for the MaxBloom X4 400W on

Pros and Cons of MaxBloom X4 400W COB LED Grow Light

  • High quality and unique build and design
  • A real 12 band full spectrum with UV and IR
  • Highly bright and dense light
  • Larger coverage area
  • Cost savvy in longer run, from power efficiency point of view.
  • Two separate dimmer knobs for convenience
  • Suitable overall lifecycle of indoor plants
  • Modular design makes assembly and disassembly of light easy
  • Effective cooling
  • Best on the segment warranty
  • No daisy chaining.

Click here to see reviews and prices for the MaxBloom X4 400W on

Bloombeast A900 900W COB LED Grow Light Editor’s Choice For Indoor Marijuana Cultivation

best led grow lightsBloomBeast A900 900W COB succeeded in securing first place on the list of Best 10 Full Spectrum COB LED Grow Light Reviews. Its one COB LED grow light that won’t leave you wondering if you should purchase a few 30w booster lights on the side.

Built using extremely reliable and durable material and a user-friendly design along with top-notch performance makes it a winner on the league.

Yeah, our selected existing users have reported that they’ve obtained around 20-25% better yield compared to the traditional LED Grow Light they’ve used to install inside their grow space earlier.

Bloombeast has equipped this COB LED using 140 x 5W LEDs and 3 large sized 100W COB chips to produce well-balanced light and illumination.

Another great feature from this BloomBeast A900 grow light is 3 mode switches. These mode switches are dimmable and you can adjust it between 0 and 100 according to the current phase of your plant’s life cycle. The three separate knobs help you achieve the best quality light for seedling, vegging and blooming phases.

Spectrum, PPFD & Coverage Area:

The most exciting part of the A series COB Grow Light by Bloombeast is the 13 band full spectrum light.

It features a 13 band of color along with ultraviolet (UV) and infrared (IR).

This light has a supportive optical lens that helps in producing evenly distributable and dense light for green weed plants in you inside grow space. Check out the image below and you’ll see the BloomBeast A900 means business.

Maximum PPFD value achieved by them from this LED grow light is 856 uMol at 24″, which is excellent regarding effectiveness in a specific area.

As far as coverage is concerned, you’ll get an ideal light for around 5’ X 4’ of grow space. Yeah, that’s huge.

Power Consumption, Heat Dissipation and Warranty:

The A900 only draws 400 watts, as it depends on dimmer settings and your way of utilization.

Also, to keep things under control there are multiple cooling fans and a high-quality heat dissipation system.

Bloombeast is one of the best LED Grow Light manufacturers. Customer satisfaction and support is their identity.

With BloomBest A900 900 Watt COB LED Grow Light you’ll get an industry leading 5 year warranty. However on a rare occasion, such situations will occur where you need to contact BloomBeast. But even if your grow light does need service, it’ll likely be covered in full.

Click here to see reviews and prices for the BloomBeast A900 900W on

Pros and Cons of BloomBeast A900 900W Full spectrum COB LED Grow Light

  • A complete 13 band full spectrum.
  • Must needed UV and IR for indoor plants.
  • Highly durable build
  • An elegant design
  • Mixture of traditional LED chips and COBs.
  • Great coverage area of 5’ X 4’
  • Higher PPFD values
  • Acceptable Power Consumption
  • 3 separate dimming nobs for convenience
  • 20-30% more yields compared to other lights
  • Fabulous cooling
  • 5 Years after sales support
  • Extremely intense light that can harm vision if seen with naked eyes.

As I said, the BloomBeast A900 COB LED has secured 1st place and became editor’s choice for my review of the Best COB LED Grow Lights on the market.

From LED and COB Placement, Intensity, PPFD and warranty coverage it provides a great value to the indoor cultivators.

We highly recommend our readers to go for BloomBeast A900 COB LED grow light to obtain a well capable coverage of around 5’ X 4’ of grow space.

You won’t regret for your decision when you notice resinous and heavier flowers in your hand.

Click here to see reviews and prices for the BloomBeast A900 900W on

My Verdict on Best COB LED Grow Lights on the market

I’ve included COBs feasible to various budget ranges, coverage capabilities, type of spectrum expectancy, and power efficiency.

But still in several cases it might seem to select the one which suits their needs in all the aspects.

And for that we’d like to give you a quick through regarding selection for the best for you.

Yeah,  if you’re a beginner and want to get your hands directly on a COB grow light then there are three options available to you. All of them have some unique features to offer your plants.

Go for the below mentioned 3 products and select one out of them based on your coverage expectancy.

And, If you’re an intermediate cultivators and wants to upgrade to COB from traditional LED or HPS lighting fixture then below mentioned products are for you.

Yeah, all are from different brands and offers different level of coverage capability so choose one depending on your coverage expectancy.

However, from power consumption point of view all three are best in the segment and will definitely help you in saving your money on longer run.

For people with 3’ X 4’ to 4’ X 4’ coverage area can either go for BloomBeast 520w COB LED Grow Light or Canagrow CXB3590 COB LED Grow Light. As both of them have tremendous performance from yield perspective.

If you’re belonging in a lobby of people with 4’ X 4’ to 5’ X 4’ coverage and a complete spectrum admirer then Maxbloom 400W X4 Plus LED Grow Light and Bloombeast A900 900W COB LED Grow Light is there for you with several tremendous controlling abilities.



What’s the best COB LED Grow Light?

The best COB LED grow light based on coverage area, light intensity, and spectrum quality is the Amare SolarEclipse SE500.

What’s the best cheap COB LED grow light?

The best cheap COB LED grow light is the Parfactworks BM4 1000 watt, or the Phlizon 2000 watt CREE COB LED grow light. Both grow lights emit great spectrums and light intensity.

What’s the difference between CREE COB LEDs and other COB LEDs?

CREE COB LEDs are the best on the market. The light intensity is much stronger than other brand COB LEDs. Grow lights that use CREE LEDs are often a bit more expensive, but worth it in my opinion.

What’s the difference between a COB LED and a regular LED?

The difference between a COB LED and regular LED is the design of the chips.

The COB chips have several LEDs clustered together on one chip, improving performance and efficiency. Regular LEDs are less intense and typically spread out over a larger space.

What distance do I hang my COB LED grow light from my plants?

Grow light manufacturers typically recommend hanging grow lights 18-24 inches above plants.

However, the intensity of light varies between grow lights, and your plants require different intensities of light during different growth phases.

During the vegetative phase, plants require less light, so you should raise your grow light higher above 18″ if it emits more than 400 uMol of light. More than 400 uMol is not needed by plants in the vegetative phase.

During flowering phase you can keep the grow light at 18″ and the plant will utilize all light you provide it.

Are COB LEDs efficient?

Yes, due to the design they’re more efficient than regular LED, HPS or MH style grow lights.

Are COB LED or Quantum Board grow lights better?

Some quantum board LEDs can be outperformed by the high end COB LED grow lights. COB LEDs are generally less expensive than Quantum Board grow lights too. The only downfall of COB LEDs compared to quantum boards is COB LEDs are slightly less efficient.


  1. MARUO, Toru, et al. “Effects of Supplemental Lighting with Light-Emitting Diodes (LEDs) on Tomato Yield and Quality of Single-Truss Tomato Plants Grown at High Planting Density.” Environmental Control in Biology, Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists, 11 June 2012,

MaxBloom, BloomBeast

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