Mars II 400 Full Spectrum Grow Led Light - Mars Hydro

Mars II 400 Full Spectrum Grow Led Light - Mars Hydro

  • Actual Power: 150W+/-5%@100--277V

  • Coverage: Veg: 3' x 3' (90x90cm); Bloom: 2.5' x2.5' (75x75cm)

  • Compared to HPS/MH/HID: 200W

  • Average Yields: 1g/W

Regular Price: US$174.99

Special Price US$162.99

  • Buy 2 for US$160.99 each and save 2%
  • Buy 3 for US$158.99 each and save 3%

Availability: In stock

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Regular Price: US$174.99

Special Price US$162.99

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Additional Information

Item NO.MarsII400 led
Draw power120V : 1.24A; 148W / 240V:0.69A; 149W
Coverage3’x3’ (90x90cm); Bloom: 2.5’x2.5’ (75x75cm)
Spectrum440nm, 460nm, 630nm, 660nm,730nm(IR), 2400k-3000k
Chip BrandNew SMD Epistar
Work Temperature-4°F ~105°F (-20°C ~ 40°C)
Compare to HPS/MH/HID200W
Lifespan50000 hours
N.W/G.W7kg / 6.65kg
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.

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Hello,Do you still have to use a timer on these lights I have a mars II 400w with the two toggle switches coming. or are they on 24/7? Just curious if I still have to purchase a timers too.

If you want to control the automatic light switch, I suggest you add a timer

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Is this the 2018 Upgraded SMD chipped version, qre all Mars 2 400w now equipped with the upgrades? Which of the chips have been replaced with smd, some or all?What are the differences between the chips?Thanks

All MarsII series led use new SMD chips, this chip has no lens out of leds, and its electrical current is also more stable 

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Can I buy and use a dimmer switch with this light? If so is there a recommended one?

Mars II 400 cannot be dimmable but it has veg and bloom switch. 

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when its time to turn on the Bloom light switch do you keep the veg lights on too ? So that all the lights are on at the same time ?

Generally, the bloom switch should be turned on after 6 weeks vegging.

During flower stage, both switches should be turned on. 

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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

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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.

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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.

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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.

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Customer Reviews 10 item(s)

1-10 of 37

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Love tech&nature Review by Fisherman / (Posted on 6/15/2019)
Highly recommend for one huge plant in a 1mx1mx2m tent, It consumes less electricity than reflector 1000W and gives less heat, (Caution if you're living in a studio type of apartment/house, would never recommend you to buy 1000W, (it heats so fast in summer!)) Go, low people, plants can't take more than they could. 300w is perfect for a single huge plant, 1kw is perfect for 4 plants in the 2m wide growing area.
Good luck Review by Nad / (Posted on 1/11/2019)
I used 2 marshydro two years ago and the results are amazing with dutch passion autos
The tent is 120*150*250
I started to 50 100 gamms per plant but the second year is amazing 3 400 gram the average yield any autos what i tried
1 plant 1 light is the best you can do with dwc technology only 10 20 minutes daily set up to 90 100 day and voila
So highly recommended
Amazing Review by Perna / (Posted on 1/11/2019)
Auto Cindarella Jack 404 gramm dry buds under ONLY 1 light
First time mars user. Review by Phoenix / (Posted on 6/6/2018)
In my first grow with my mars ll 400 and my plants seem to be loving them.

Can’t wait to see the bloom stage.
Mars II 400W Review by MikeC / (Posted on 5/27/2018)
Works great. Nice and quiet and barely any heat production.
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.

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