Mars Hydro TSL-2000 Test and Overview

Are you looking for the perfect grow light to grow cannabis in a 2×4 foot grow tent? Or even for a 4×4 foot grow tent? I decided to purchase the Mars Hydro TSL-2000 to see how it stacks up to competition.

After testing the Mars Hydro TSL-2000 and comparing it to other grow lights, I think it’s the best bang for the buck for growing cannabis or other flowering plants in a 2 by 4 foot grow tent. You can use two of them to light up a 4×4 foot grow tent.

The TSL-2000 provides strong light intensity, good light spectrum, and sufficient coverage for your grow space. These are all essential factors to consider when purchasing a grow light. 

Mars Hydro TSL-2000:

mars hydro tsl-2000

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Free Grow Guide to Download



This is a quantum board style LED grow light, meaning it has a simple and more efficient design compared to older grow light models. It’s made of two long LED boards, the aluminum reflector, and two drivers.

The light is about 40 inches long so it fits nice and snug into your 2×4 foot grow tent. I would say the length is probably one of the better characteristics for a 2×4 foot grow tent because it allows the LEDs to be directly above a majority of the tent space. Many other grow lights have smaller dimensions which affects their coverage capability.

The light doesn’t use fans. Modern grow lights like the TSL-2000 have ditched the electric cooling fans which reduce efficiency, and improved the design so heat passively dissipates off the grow light. I’ll speak a little more about heat later, but as long as you’re running fans in your grow tent you’ll be fine.

The drivers are fully dimmable, and unlike other grow lights, the dimmers are on the top of the ballast so you don’t need to unscrew the ballast to dim the grow light.

Considering the design, price, and performance of the TSL-2000, I wouldn’t even consider a pink/purple/blurple spectrum grow light after using this grow light.

Spectrum and Light Intensity:

mars hydro TSL-2000

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I mentioned grow light spectrum earlier. The proper spectrum for growing cannabis is present in most grow lights. Science hasn’t exactly settled on a perfect spectrum for plants, but the grow light industry has more or less figured out that white spectrum is better than the “blurple” pink/purple color light that’s used on older grow light models.

Free Grow Guide to Download

There have been a few studies conducted that found white spectrum like the spectrum used in the Mars Hydro TSL-2000 grows plants about 10-15% better than the older purple spectrum.

The TSL-2000 does include infrared diodes. There aren’t that many because you don’t need much of infrared in the spectrum. But it’s there.

As for light intensity, I tested the TSL-2000 myself and found it to be even stronger than I anticipated. I use a lux meter app on my smart phone and convert the lux reading to PPFD using Waveform Lighting’s Lux to PPFD calculator

In short, I found the TSL-2000 to emit about 50,000 lux (~1250 micromoles) in the center, and about 40,000 lux (~1025 micromoles) on the sides of my 2×4 foot grow tent. The readings were taken with the light hanging 18 inches above.

TSL-2000 Compared to Other Grow Lights:

Anyone looking for a grow light knows there are a lot of options out there, so how did the Mars Hydro TSL-2000 stack up?

I’ve owned a few grow lights for 2×4 grow tents, and I’ve read up on just about all the others. To be honest, this would definitely be my personal top choice for reasons you’ll read below.

There are a few other high quality grow lights out there for 2×4 feet, such as the Green Sunshine ES300, or the Timber LED 4VL. The Timber costs double and the Green Sunshine ES300 costs more than double.

The Spider Farmer SF-2000 is another good choice, but at the same price as the TSL-2000, the light intensity is noticeably less on the sides of the tent compared to the Mars Hydro. That’s likely due to the design of the SF-2000.

The Phlizon Linear Series PH-3000 is takes power up a notch, coming in at an impressive 450 watts. You’ll pay more for that extra wattage, but it’s another option.

And lastly the most powerful bar-style LED option is the Mars Hydro SP-6500 coming in at 650 watts. The ability to stack this much power in a 3×5 foot area as needed is pretty impressive, but the price means it’s most likely intended for industrial growers.

In terms of power consumption, the TSL-2000 falls right in the middle at 300 watts. The Spider Farmer SF-2000 consumes 200 watts, and the Timber LED Model 4VL consumes 400 watts.

People ask me how the Mars Hydro TSL 2000 compares to the Mars Hydro SP-250. While the two lights are similar in size and shape, the SP-250 uses 230 watts, while the Mars Hydro TSL-2000 uses 300 watts.

Power consumption isn’t a make or break deal for me, but if 300 watts is a deal breaker for you, I think the SF-2000 is probably your next best option at 200 watts.

If you have a grow tent or space shaped differently than 2×4 feet, and you want to stick with Mars Hydro – you can always check out their other models as well, which I wrote about here.

If you’re willing to spend a little extra and get more features, I highly recommend the Mars Hydro SP-3000. You’ll get ultraviolet (UV) light, dimmer knob, and upgraded Samsung and Osram LEDs.

You can also check out the Mars Hydro FC Series if you’d prefer a bar-style grow light.


Click Here to View Details or Buy the Mars Hydro TSL-2000


My Video Overview:

Mars Hydro TSL-2000 Grow Light | Test and Overview

Specifications Overview:


Specs:Mars Hydro TSL-2000
Dimensions: 39.21”x9.97”x3.54”
Weight: 7.85lb
Coverage Area: 2×4 feet
Wattage:300 watts
Intensity (PPFD): 972 uMol @ 18 inch
Spectrum:Full White + IR
LED/Driver Brand: Unbranded
Voltage 120v; 240v; 277v
Warranty: 3 Years
Where to buy:LED Grow Lights Depot

Heat & Removable Drivers:

Does the TSL-2000 get hot? Yes. Not as much as HPS grow lights though. Every grow light emits heat. With that said you should be running an inline fan as well as an oscillating fan in your grow tent.

One huge advantage of these Mars Hydro grow lights is the removable drivers. As you can see in the image below, I was able to unscrew the drivers and keep them several feet outside the front of my grow tent without affecting the operation of the grow light.

tsl-2000 removable drivers

This is a huge advantage because there are still a lot of growers who have trouble keeping their tent temperatures down. If that could be your situation, you should consider the TSL-2000.

Keeping the air cool and moving around are essential to preventing mold and maintaining a proper climate for your cannabis plants to grow.

Hang Height:

What height should you hang the Mars Hydro TSL-2000? I wrote a whole guide to hang height, because it’s actually a bit more complicated than you’d think.

With that said I’ll save you some time and tell you how I’d hang the TSL-2000:

For seedlings you’ll need this light at 28 inches AND dimmed 50%. For the vegetative phase (18 hours on/6 hours off), I’d recommend hanging at 24 inches at full power. During the flowering phase I’d recommend 18 inches at full power.

Other Notes about the Mars Hydro TSL-2000:

I noticed a few things during my experience with this grow light.

The aluminum frame is not flimsy, as some people have claimed. You would need an intentional amount of strength to bend it.

The dimmers are a nice feature, but look like they might be a pain to adjust because the hole is small and the screw is so deep inside. I personally wouldn’t want to dim the light but you may want to. You can always hang it higher.

For a 4×4 foot space I think two TSL-2000s might be more advantageous than one TS-3000. I haven’t owned a TS-3000 but simply looking at the dimensions, I’d probably prefer the 40 inch length of the TSL-2000s and place two side by side instead of one TS-3000 unit that’s only 25 inches wide.

With that said I’ve spoken to owners of the TS-3000 who were very pleased with that light so I could be wrong.

The TSL-2000 comes with an outlet timer, which is a nice compliment to the product. You’ll definitely need it.

Warranty and Customer Service:

Mars Hydro provides a generous 3 year warranty with the TS series grow lights. I’ve dealt with Mars Hydro myself, and I can say they were always timely to respond to my emails.

Owners of the Mars Hydro TS Series grow lights have good things to say about their experiences. I talk to growers daily in the live chat, and I’ve heard from very satisfied owners of the TS series grow lights. I’m also very pleased with my TSL-2000.

How is the Mars Hydro Bud Quality?

mars hydro cannabis

The Mars Hydro spectrum leads to very nice quality buds. Of course light isn’t the only factor for yields, but if you hang the light right, and use it in the proper sized grow space, you should be seeing good results in no time!

Click Here to View Details or Buy the Mars Hydro TSL-2000 Grow Light


  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,
  2. Chandra, Suman, Hemant Lata, Ikhlas Khan, and Mahmoud Elsohly. “Photosynthetic response of Cannabis sativa L. to variations in photosynthetic photon flux densities, temperature and CO2 conditions.” Physiology and Molecular Biology of Plants 14.4 (2009): 299-306.
  3. Sharakshane, Anton. “White LED Lighting for Plants.” bioRxiv (2017).
  4. Eichhorn Bilodeau, Samuel et al. “An Update On Plant Photobiology And Implications For Cannabis Production”. Frontiers In Plant Science, vol 10, 2019. Frontiers Media SA, doi:10.3389/fpls.2019.00296. Accessed 14 Oct 2019.
  5. Lin, K., Huang, M., Huang, W., Hsu, M., Yang, Z. and Yang, C. (2013). The effects of red, blue, and white light-emitting diodes on the growth, development, and edible quality of hydroponically grown lettuce (Lactuca sativa L. var. capitata). Scientia Horticulturae, 150, pp.86-91.
  6. He, Dongxian & Kozai, T. & Niu, Genhua & Xin, Zhang. (2019). Light-Emitting Diodes for Horticulture: Materials, Processes, Devices and Applications. 10.1007/978-3-319-99211-2_14.

Other References:

2. Mars Hydro

3. The importance of Ultraviolet and Infrared wavelengths for growing cannabis.

What size space is the Mars Hydro TSL-2000 good for?

The Mars Hydro TSL-2000 will properly light a 2 by 4 foot grow space.

Does the Mars Hydro TSL-2000 get hot?

Yes, all grow lights emit some heat, but as long as you’re using an inline fan in your tent you should be fine.

How many watts is the Mars Hydro TSL-2000?

The Mars Hydro TSL-2000 consumes 300 watts.

Does the Mars Hydro TSL-2000 have infrared (IR)?

Yes it contains infrared diodes.

What Height do I hang the Mars Hydro TSL-2000?

For seedlings hang at 28 inches dimmed 50%. During the vegetative phase hang at 24 inches at full power. During the flowering phase 18 inches at full power.


My name is Nick, and I'm a home grower who spends time writing about indoor growing tools and setups. My goal is for 420ExpertGuide to be a one stop shop for indoor growers to find the information they need.