Mars II 400 LED growing light good for medical plants in door hydroponic seeding growth flowering

More Views

Mars II 400 LED growing light good for medical plants in door hydroponic seeding growth flowering

  • Coverage: Core Coverage: 2.5ft*2.5ft  | Max Coverage: 4.5ft*4.5ft

  • Max Yield: 1.8g/watt

  • PPFD: 392

  • Replace HID/MH: 250W

  • Draw Power: 162W@110v;   159W@220v

Regular Price: US$174.99

Special Price US$162.99

  • Buy 2 for US$158.99 each and save 3%
  • Buy 3 for US$153.99 each and save 6%

Availability: In stock

Ask a question (5)

* Required Fields

Regular Price: US$174.99

Special Price US$162.99

Add to Wishlist

Frequently bought together



Full spectrum Mars II 400 LED growing light good for medical plants in door hydroponic seeding growth flowering for all seedling, growth, and flowering stage

Additional Information

Item NO.Mars II 400 (USA)
CoverageCore Coverage: 2.5ft*2.5ft | Max Coverage: 4.5ft*4.5ft
Max Yield1.8g/watt
Compare to HPS/MH/HID250 watt
Draw power162W@110v; 159W@220v
Spectrum440nm, 460nm, 630nm ,660nm,730nm(IR), 2400k-3000k
Chip BrandEpistar
Voltage85v - 265v
Decibel Value58
Plug TypeEU,UK,AU,USA,Japan
View Angle of LED90°-120°
Lifespan50000 HOURS
Dimension14 in x 14 in x 3.5 inches
Work Temperature-4°F ~105°F (-20°C ~ 40°C)
N.W/G.W13lb. 5.36Kg.
UPC Number708747426786
Spectrum/ Par
Grow Tips

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 stage: 20''~28‘’ Veg Stage: 16''~20‘’ ;Flowering Stage: 10''~16‘’

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.


Product Questions

When will my order be shipped?

Your order will be shipped within 24 business hours after we receive your cleared payment. Local stock in US/Canada/Europe/UK/AU. The delivery will take about 2-7 working days and no custom tax is needed if shipped locally.

Rate the answer?
Do you offer warranty on the light?

Yes, we offer warranty on each light of Mars Hydro. If there is any problem about the light, email Mars Hydro service timely and we will help you as soon. or

Rate the answer?
Do you know the ETA when the light will be delivered after I place order online?

Yes, we do. As usual, package will be delivered within 2-5 business days in USA or CA, and 3-6 business days in UK or EU. Besides, Mars Hydro service will email you tracking number and link. Also we will track the package timely and email you to pick up the package after it is delivered.

Rate the answer?
Can I order some spare replacement parts when I order the light? If can, where should I order them?

Yes, you can buy some spare replacement parts if you would like. But you can not order online directly. You should contact us online or email Mars Hydro service. We will help you.

Rate the answer?
Are there any other items together with the light? such as powercord, cables and so on.

Yes, there are. We pack the light together with powercord, cables, manul, and after-sales warranty.

Rate the answer?

You may also be interested in the following product(s)

Customer Reviews 10 item(s)

1-10 of 32

  1. 1
  2. 2
  3. 3
  4. 4
Pretty good! Review by Demonsparkx / (Posted on 12/26/2017)
Have 3x the mars hydro 300W led panels. Great
For what they are and their performance thusfar. Would love to showcase sponsor your other products if i could! See more on my reviews for the mars 300 only on YouTube @demonsparkx
Best on the market Review by D / (Posted on 10/13/2017)
Mars lights are in my opinion the best on the market. The specifications of these lights are in the same range as your more expensive led's but at a very reasonable price. Don't be fooled. There are cheaper led's out there but not better. I had a spectacular harvest from this light. I'm very impressed with the results. Getting ready to purchase another one with a tent.
400 Review Review by Smokey / (Posted on 7/4/2017)
the light is a decent product
Nice healthy plants! Review by Chris / (Posted on 3/14/2017)
On my second grow with the Mars ll 400 and I couldn't be happier. Not a lot of heat and my plants are loving them. Thanks for great service and shipping!
Great value Review by Frankir / (Posted on 3/12/2017)
Mars hydro led grow lights are very powerful lights as a reasonable price. My plants absolutely love these lights. I use my mas II 400 in a 2x2 grow tent. Mars hydro is the solutuon to your grow needs if your looking for high end led at a low cost.
Works Great! Review by Julio / (Posted on 3/11/2017)
Bought 2 and Both turned on just fine, Was kinda nervous of one not working or both kinda have a little bad luck.Overall my plants are loving it !
Mars II 400 Review by Dane / (Posted on 3/10/2017)
I have had nothing but great success with this light. I bought another and of corse it also works great. I had a question and got fast answers from Mr Bruce Lee via email. Highly recommended.
the light Review by tommie / (Posted on 3/10/2017)
great light 4 the product did the job !
light on Review by tomslick / (Posted on 3/10/2017)
one of the best light in the business mars2 was the best light i can buy
have no complaints, great lights, priced right Review by barrysgroove / (Posted on 3/10/2017)
Bought 3 lights now from mars hydro, no problems with any of them, they do a freat job

Add A Review

your email address will not be published . required fields are marked *

Your rate *