What would you recommend to replace a 1000w HPS in a 4x4 tent?

Dr.Pepper99

Dr.Pepper99

Active Member
Hi guys, I've been a member for almost 8 years and I don't think I've ever posted before lol, just lurking and reading lol.

So, my question is; what would you recommend to replace a 1000w HPS in a 4x4 tent? That's what I currently have with an air cooled hood hooked up to a 6" inline fan, but the temperatures in the summer are unmanageable and I want to switch to COB lighting to remedy this. I have a separate area for vegging and do perpetual grows, so the COBS would be for flowering only. I'd like to have the maximum amount of light possible at a 12-18" distance from the canopy without bleaching them and the best possible coverage as well. I'm thinking of going with 3-4 3500k 300 Watt Cree CXB3590 (4) COB Grow Light Kits from Timber Grow Lights. I'm gonna make a 4x4 frame for them from aluminum and have all of the drivers outside of the tent to further reduce any heat. I don't care about the efficiency or power savings as I'm not paying the power where I live, but I can't install an AC because the landlord doesn't allow AC units in his building. So what do you pro LED guys recommend? I know 12 COBS would be good from what I've seen on here, but would 16 be overkill, and possibly also have too much heat in the tent? Thanks in advance guys.
 
HydoDan

HydoDan

Well-Known Member
I think running 12 cobs @ 75 watts each would be more than enough for the area.. 900 watts is a shit load of led light and will easily surpass the 1000 watter...
 
sixstring2112

sixstring2112

Well-Known Member
700 to 750w of cree in that space is plenty of light.12 x 62w cree would be awesome and i think dan can set that up for you if you put 4 x cobs on the mw 240-1750ma it works out to about 740ish watts.personally i would go with the 3000k 80cri cree if he has them in stock.would kill it in a flower only tent.gl
 
Joe34

Joe34

Active Member
Why dont u build your own? The timberlight kit mentioned above is driving those Vero's it uses quite hard, outputting only 150 L/pw, you could afford more veros and drive them lower getting much better l/pw with the money saved going DIY.
 
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VegasWinner

Well-Known Member
Dr.Pepper99 said:
Hi guys, I've been a member for almost 8 years and I don't think I've ever posted before lol, just lurking and reading lol.

So, my question is; what would you recommend to replace a 1000w HPS in a 4x4 tent? That's what I currently have with an air cooled hood hooked up to a 6" inline fan, but the temperatures in the summer are unmanageable and I want to switch to COB lighting to remedy this. I have a separate area for vegging and do perpetual grows, so the COBS would be for flowering only. I'd like to have the maximum amount of light possible at a 12-18" distance from the canopy without bleaching them and the best possible coverage as well. I'm thinking of going with 3-4 3500k 300 Watt Cree CXB3590 (4) COB Grow Light Kits from Timber Grow Lights. I'm gonna make a 4x4 frame for them from aluminum and have all of the drivers outside of the tent to further reduce any heat. I don't care about the efficiency or power savings as I'm not paying the power where I live, but I can't install an AC because the landlord doesn't allow AC units in his building. So what do you pro LED guys recommend? I know 12 COBS would be good from what I've seen on here, but would 16 be overkill, and possibly also have too much heat in the tent? Thanks in advance guys.
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I would go with 16-CXB 3590, 3500k, 36v, 4-HLG-185H-C1400A Meanwell led drivers for 50w/SF. I would not concern myself with dimming as the design is set to produce. Why waste time with dimmers just go to work. This setup will give you a PPFD of 700-900 ideal for what you are wanting to do. I would go with active heat sinks in a enclosed area, and passive heats sinks in an open area. either way you can get a variety of pre-drilled heat sinks, plenty of cob sellers with holders and reflectors, and if you have no building skills get a friend to help fabricate a frame and mount the heat sinks. I mount megatronics heat sinks passive with wire from the ceiling no frame just move where you want them.

The goal is 50w/sf for flower and 25w/sf for vegetative growth.
 
Dr.Pepper99

Dr.Pepper99

Active Member
Thanks for all of the recommendations guys. So I'm basically down to two choices, the 900w Cree CXB3590 kit with 12 COBS at 385 PAR watts, or the 900w Vero29 V7 kit with 9 COBS at 450 PAR watts. Which of these two would you guys think is better for a 4x4 flower only tent? I know the Vero kit is much more efficient and has significantly higher PAR watts, it's also $300 cheaper than the 900w Cree kit, but only has 9 COBS, so I'm assuming that the Cree kit has better coverage up close than the Vero? I see everywhere on the site everyone praising the CXB3590's but are the Vero's also really good? I wanna get the best of the two and not have to buy another light for many years until this one fails in some way, but if the differences are minimal, I'd also like to save $300 lol. Thanks in advance for any help guys.
 
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