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I don't know how the math works but I went with the 10" profile 6" long. (thanks supra). I am in the process of building it.

[QUOlol that's cool.umanrob, post: 12025023, member: 896155"]uh... I wish I was that organized. I just bought self tapping screws at Home Depot and then held them up to my drill bits until I found one slightly smaller. Sorry I didn't pay closer attention or keep records. Lol thats

@Humanrob what size drill bit and self tapping screws did you use?

Cool. I'll ask and in a few weeks when I get my diy light done I'll let you know.

So from what I'm reading I gather citrus will not work in coco? I think I'm going to try it anyway with cal/mag added.

@bruce786 I know you used a 4mm drill bit. What size screw did you use? I was thinking of using a #6 or #8 self tapping screw.

@qwerkus i must have missed it, where did you get those from?

Not 8 of the 200's. 8 cxb3590's.

@Growmau5 What thermal compound do you use?

Nice. I just ordered 8 myself. @BM9AGS i see you ordered the connectors i did too. What reflectors are you going to use?

Do the drivers come with an ac plug already on?

I think I'm going to put 2 cobs on 5.8X18 heat sink, spacing the cobs 12" apart. I think that gives me the best chance to fill any area with one cob a square foot.

Could you run this setup on the 5.8 heatsink passively ?E="SupraSPL, post: 11990810, member: 129132"]A general starting point that you can scale up (4) Cree CXB3590 3500K CD 36V (email Jerry jl@kingbrite.cn) (4) Ideal COB Holders 50-2303CR (4) Lenses/reflectors (1) Mean Well HLG-185H-C1400 (1)...

How do you think 4 of these gogreen 200's would do in a 5x5?

Cool, I can't wait to see some new designs. I think one of the advantages of cods is to spread them out but everybody is cramming them in a 15 to 20 inch square. In a few months I'll have two 3.5x3.5 foot tents going and want 850 ppf avg. for the canopy. Thanks.

Any plans to make a 4 cob strip about 3 feet long? What is the spacing distance between cobs?

Hey Real what made you go with lens and not the cone reflectors?

So does that 500 watt light pull 12amps from the wall?

Thanks Banana, What do you think is the cheapest way to inoculate the roots with mycos ?

Hey all, I am using coco and 1.5ml of orca a gal. I'm positive it does not hurt to give it orca all the way threw flower but the stuffs not cheap and I am. lol . So when does root development max out and not benefit as much from the mycorrhizae.