Mars Cree COB 300W Led Grow Light - Mars Hydro

Mars Cree COB 300W Led Grow Light - Mars Hydro

  • Actual Power: 120W+/-5%@100--277V

  • Coverage:Veg:2.5’x2.5’(75x75cm); Bloom:2’x2’(60x60cm)

  • Compared to HPS/MH/HID:180W

  • Average Yields: 1.2g/w

  • Average Yields: 1g/W

  • The Item You Check Now is Discontinued. But  Mars TS 1000 Will be A Great Choice for Upgration, Click Here to Know More!   


Availability: Out of stock

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Solid 5 star light brings out the best in your plants! Review by OB / (Posted on 4/17/2019)
An excellent grow light all around! I’ve been using 3 Mars COB’s in an array configuration for about 9 months and they’re really superb lights! A small cross breeze over the lights keep them cool to the touch. The light coverage/penetration is very good with these lights which is lovely. Plants stay low and don’t stretch much either. Very impressive yields holy moly! I own several different brands of high end LEDs and the Mars COB is my favorite! I can’t seem to justify using a different light these are THAT good!
These quiet lights very Review by Mar / (Posted on 4/12/2019)
I really like it
Bad ass cobs lights Review by Big Len / (Posted on 8/20/2018)
Hi there I just saw your coblight I would love to run your lights on my you tube channel show all the other grower your lights are awesome I would do show them off on my channel you tube channel Big Len .I am disabled can you help me out and I will help you with my groups thank you for your time please help me to help you
Great Cob Lights Review by NizzlyBear / (Posted on 3/27/2018)
These Cree Cobs are very well made and the cases are a great addition. With just a small breeze blowing over them they stay cool. They are much easier to hang than Cobs on a built frame and work very well to save space being very compact with amazing light output and spread per Cob with the added Osram blue/red chips. The price is very fair considering the quality of parts used and the case that Mars Hydro has designed is just fantastic. I highly recommend anyone interested in these lights, I have had excellent results with them.
Quick delivery and solid study build. Will follow up with a performance review. Review by Bethnal Green / (Posted on 3/26/2018)
I ordered 3 100w COB LEDs on the wednesday and they arrived on the friday. So the delivery service I can't fault. The packaging was excellent. The lights are completely surrounded in styrafoam so they can take serious knocks and there won't be any damage to the lights. The build quality of the lights are brilliant. They have a real solid feel to them. There seems to be a stigma when people read made in china. But these things are solid. Can't comment on how well they perfom yet until I get to the end of this run but so far they seem to be performing well. Will update with the results in a couple of months. But so far I'm very happy with the lights!!
3590 cree is the king Review by Michael / (Posted on 3/3/2018)
This light is the best. White Berry in 120x60x170 scrogg 2,5 g p/watt only with 100 watt cob.
Awesome small veg light! Review by match / (Posted on 1/26/2018)
This light is perfect for my purpose, a small seedling/ clone tent. I’ve had it two weeks and I can’t believe how lush these little plants are. The color is pleasing to look at while admiring the leaf growth. I’m at 24” over canopy. From what I’ve seen even in 18 days, I know this will vegetate my plants perfectly until their move to flowering tent. Well done Mars, shehshe!
cob Review by F.N. / (Posted on 12/18/2017)
This COB is one of the best on the market. They surround it with orsam far red chips to enhance terpene production very smart. This is one of the most efficient lights ever produced for growing marijuana. 800 watts will do a five by nine that is UNREAL
grown under 1 cob and 2 Mars 400's. hope to get one more cob again. Review by George DE Roth / (Posted on 12/12/2017)
1 week of flush left but pulled a small bud to dry and try out. Headlock OG (Chemdawg x Nightmare OG). Pretty dense. grown under 1 cob and 2 Mars 400's. hope to get one more cob again.
plants under cob light look very happy.thx Review by Steven Harrison / (Posted on 12/12/2017)
Having a little trouble with some of the leafs curling up, but it's not the light's problem, I know, and now sloved all, plants under cob light look very happy.thx
now trying to use the cob, hope it brings me more surpise. Review by Vlader Flyer / (Posted on 12/12/2017)
Best distance from mh recommendation is 18-24'' between panel and plant in vegetation stage and bloom light is 12-18'', im using Mars Hydro Pro II 160, and now trying to use the cob, hope it brings me more surpise.
Mars Hydro is a great company! Review by Luke Mo / (Posted on 12/12/2017)
yup up to now only good words to say , and its from one of my 3 favorite city in the world , would love to pay you guys and girls a round of mijiu next time i'm in town
cob auto at 88 days. She's just beginning to bulk up so I'll give her 2 more weeks give or take a few days, cheers! Review by Bob De Leon / (Posted on 12/12/2017)
cob auto at 88 days. She's just beginning to bulk up so I'll give her 2 more weeks give or take a few days, cheers!
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.

Product Questions

Does the cob make more new series ? like 400w,600w, 800w, 1000w?

Our COB only have one 300w. If you like bigger wattage, you can order 2 or 3 COB to use. Use more small lights can make the light more balance. And we have 20% discount now.

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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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What does COB mean?

COB is a type of LED grow light, It's typically made up of a very large chip. Mars Hydro COB use Cree and Osram chips, Meanwell driver. Good materials, the price is also affordable

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How many of these lights for a 4'x4' tent?

4pcs of Mars COB can work for 4'x4', we have 20% off now this leds now

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Which Cree COB do you use exactly?

It is Cree Cxb 3590

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Hello, Thank you for cob light, I am wanting to know if the Meanwell hlg-100h-54a driver in the picture, it shows the driver with the 2 black caps covering the opening to adj. output levels? Are they now on the bottom of the driver like sp250? No worries if not, just asking. Thank you.

No, the COB MeanWell driver is no dimming function, not same with SP250's driver

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Does this have separate switches for veg and flower?

No switch on this lamp .

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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. [email protected] or [email protected]

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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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