Mars COB 300W Waterproof No Noise-Mars Hydro

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Mars COB 300W Waterproof No Noise-Mars Hydro

  • Coverage:  2.5'x2.5'/ one light ,5'x5'/ 4pcs light 

  • Max Yield: 2.0g/watt

  • PPFD:

  • Replace HID/MH: 150W

  • Draw Power:110V/110W±5% / 220V/108W±5%

Regular Price: US$255.99

Special Price US$239.99

  • Buy 2 for US$232.99 each and save 3%

Availability: In stock

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Regular Price: US$255.99

Special Price US$239.99

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Frequently bought together



Hydroponic Grow Lights Mars CX3590 CREE and Osram Red 660nm COB LED Grow Light 100w for Grow Cabinet Hydro Herb Fanless No Noise

Additional Information

CoverageCore coverage: 2.5'x2.5' / Max coverage: 4.5'x4.5'
Compare to HPS/MH/HID150w HPS
Draw power110W + - 5%@AC120V 108W + - 5%@AC240V
Spectrum450~475nm 620~630nm, 650~660nm, and white
Chip BrandOsram, Cree
VoltageAC100-240V AC277 for North America only
Amps0.987A/120V 0.46 A/240V
Decibel Value0db
Plug TypeUSA. UK, EU, AU, Japan
Lifespan50000 hours
Dimension290*220*210mm (12'x9'x8')
Work Temperature-4°F ~105°F (-20°C ~ 40°C)
WarehouseUSA, UK, DE, AU, Canada
UPC Number600740988462
Spectrum/ Par

Grow Tips

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 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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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 6 item(s)

11-16 of 16

White widow auto down 3 mars cob reflectors rdwc 7.5gal cells 40gal total. now try my new grow with new 4th arrvial cob light, hope get a better yields Review by Łukasz Rus / (Posted on 12/12/2017)
White widow auto down 3 mars cob reflectors rdwc 7.5gal cells 40gal total.

now try my new grow with new 4th arrvial cob light, hope get a better yields
Ty mh,thx 4 the coupon Review by Joey Coors D / (Posted on 12/12/2017)
Thx 4 the coupon code: sean520
And Ty marshydro, The cob is work great to my plants.
cob is good ligt to try trust me man Review by Elliot Jz Hoyle / (Posted on 12/12/2017)
Just recieved my first order from Mars Hydro. All working correct and really impressed how quiet the fans are. Not starting the grow until Dec, just getting the final prep done but should b good. love the cob and my girls feel good.
Dryed one auto white widow 368g love my marshydro cob Review by Jason M Arnett / (Posted on 12/12/2017)
Dryed one auto white widow 368g love my mars cob light
love my cob boy Review by fabian sam / (Posted on 12/12/2017)
the mars guy helped me the right choice, and gave a good deal. thanks and love my cob so far.
the cob is great light Review by terry handsome / (Posted on 12/12/2017)
Thank you mars hydro, I will purchase from you again, love the cob and the quality is good, really no noise and my plants feedback well.

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