Recent content by k dog

Thanks qballizhere

I am going to build a grow light for a 4x8 grow. I have tried to download a cob calculator but my phone won't open the file. I would like to figure out what the draw at the wall would be and also the par, PPF, etc.If anyone could run the numbers it would be a big help. I was thinking of using...

@Tim Fox What kind of yield are you getting with the 1812's compared to the Cree 3590's?

It will vary from time to time. probably about 12 give or take.

Well I want to use the cree cobs cause everyone I have talked to has said good things about them.

I am designing a 4X5 grow room and am thinking of using 8 cree cxb3590 3500K cobs. I have two questions about this setup. 1. Will the 8 11,000 lumen cobs be enough to cover the footprint? 2. If it is then should I go with 1 mean well hlg-185h c700 or 2 hlg-185h c1400? I understand that it will...

Agreed. Every situation is different. I'm new at this and as I go along I'll refine my system and method. I think that this setup is a good starting point.

That's 6900 lumens per sq. foot not per watt. This setup should pull about 260 watts at the wall. I patterned this setup after one that produced about 1.5 gpw yield. I'll see for sure later when all is said and done.

The cob that I'll be using will actually be a minimum of about 6900 lumens per sq. ft. I'm hoping that will enough.

I found the cree cxb3590-0000-000N0BCD40E cobs for 31.99 each plus 8.99 for shipping so I think that I'll probably go with them. As far as the heatsink goes that works out to be around 15.66 for each cob. That's less than what I figured it at. I rounded up a bit just to be on the safe side. The...

I was looking at some arctic alpine 64 plus cpu coolers. I was thinking of using cree cxb3590 -0000-000N0BCD40E 4000k neutral white 12000 lumen.

Thanks qballizhere. I just looked at the numbers again and you're right. I will probably drop down to a 3X3. That will push it up to about 80 per sq. ft. Also after researching the passive heatsinks the cost is about $100 for the 5 cobs. Any info on fan cooled heatsinks would be greatly...

First time poster. I am going to build a grow light for a 4X4X7 grow. I decided to go with 5 cree cxb3590 cobs. My question is what heatsink should I go with for a passive setup?