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Mars II 900 LED Grow Light(USA)

  • Buy 2 for USD307.99 each and save 5%
  • Buy 3 for USD294.99 each and save 9%
  • Buy 4 for USD285.99 each and save 12%

Availability: In stock

Quick Overview

The high intensity Mars II 900 is incredible powerful for 3.5‘x3.5’ size’s growing. Full spectrum, high quality but with affordable price makes it the best choice for your indoor growing.

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Mars II 900




110V: Veg : 268.1w±5% / Bloom: 389.5w±5%|220V: Veg: 265.8w±5% / Bloom: 386.5w±5%

3.5@110v 1.8@220v

85v - 265v


19lb. 8.71Kg.

3.5'X3.5' (105cm x 105cm)

50000 hours


440nm, 460nm, 630nm ,660nm,730nm(IR), 2700k-3000k



15’’ x 15" x 4" (420*420*90)mm

Seedling:24”-30“ Growth:18”-24“ Bloom:12"-18 "

-4°F ~105°F (-20°C ~ 40°C)


UK,USA,Canada, Australia, Germany,China



Grow Tip

1.How do I determine the right light for my grow area?

Measure the floor space. Multiply the length times the width and this will give you the square footage. You should be able to get decent results with 30-50 actual watts of power per square foot.

2.For larger areas should I go with a single large panel or multiple medium to small lights?

Using multiple lights allows you to better distribute the intense light in more areas of the grow space instead of having all of the higher intensity light concentrated in only one area while the outer edges never receive intense light.

3.Recommended Hanging Distance Above Plants

Seedling: 24'' Germination: 24''-30'' Veg: 18''-24'' Flower: 12''-18''

4.Here are more tips for grow under our light:

Growth stage, turn Growth switch on. Bloom stage, turn Growth and Bloom switches on.

5.Recommended Lighting Time

Veg: 18/6(on/off) or 20/4(on/off) Flower: 12/12(on/off)

6.Recommended Growing Conditions

The rate of photosynthesis and transpiration are directly affected by temperature, humidity and airflow.

The perfect temperature and humidity for your plants are found between 75°-85°F and 50% - 70% humidity, with plenty of airflow to replenish CO2. PH is 6-6.5. You may add more calcium and magnesium than normally needed.

7.Please Note

The light is not water-proof, so do not use it under water environment.

Light may be too strong, please wear your sunglasses when looking at it.

Some leds seem dim. They are IR. Human eye can not see IR very clearly, but you can wear sunglasses to check.

Write Your Own Review

Customer Reviews

Great Review by Growtips101
All around good light for 3.5 x 3.5 , evrything you need
Just an awesome light!!! Review by Leonard
Awesome light couldn`t be any happier I will be purchasing another light from here again that's for sure! Awesome service, fast delivery and just overall great product. Can`t go wrong with this set off light for a great closet or any indoor type of growing. I highly recommend these lights to any one who wants a good product.
Working like a charm. Review by Kevin
The 900 is perfect for my grow space and the price and quality is top notch. Plants really love the full spectrum. I recommend it to anyone interested in growing a garden!
First time grower Review by BeachBum
Awesome light and works great. Once I put my plants under the mars light, they took off! Started Bloom 2 days ago and can see them grow over night. For my second grow, Im definitely going to buy this mars light again.
Great overall light for the price Review by Steve_carn
Great light on my second grow with this light forth overall will mars lights. Preforms well but had to adjust light height bc keep burning plants at the heights they suggested. Raised up about 4 more inch's and was good it stop. But would recommend buying these to anyone wanting to try. Thanks Mars!

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