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For a 4'x4' space and for bloom; With two panels of CXB3590, 4 COBs on each panel and alternating 3000K 3500K 3000K 3500K, I was thinking of adding a 3rd panel in-between those two which would have all 2700K COBs. So the layout would look like this above the 4x4 footprint: 3000K 3500K 3000K...

@ Oregon, Beautiful photos! I grew some of the F2 C99 and never forgot how nice it was. The coloration and form of your buds is just like I remember. Great story too.

Yes. It was magnificent! ;)

How far from the tips should COBs at 50W each be placed from the tips in both veg & bloom? 4 COBs are on one heatsink for 200W total. In Veg, the COBs are four all 5000K and in Bloom, they're placed as 3000K - 3500K - 3000K - 3500K Also, how far should the cobs be kept above clones and newly...

Thanks for the replies. I much prefer Sativa and my favorite was Cindy 99. Always worth trying new options though.

Back in the day, Cindy 99 F1 & F2 was the shits. For a musician who wanted to have that pure sativa high while playing music and composing, it just didn't get better than Cinderella 99. Indica was fun for a detour but for a gig, Cindy 99 was just about perfect. So now it's today, 16 years...

Great answers, very helpful. I have both stranded & solid wire but not sure which gauge solid wire best fits. I'll try the tinned stranded first, I think my solid wires look to be too thin & too thick.

@taz Thanks. Never thought that would be the way this would go. I'm used to the connectors where you press on a tab on the outside of the plug, to release the connector. Never ran into one where you press a pin in to remove it. Seems like the 2nd would get caught & be locked in. Good to know...

Hi, For some reason I thought the COB holders used screws for the electric contacts. Nope... I am looking at the Ideal COB holder's female plug in front of me and not sure how to wire to it without a mating plug...

I guess I need to assemble and then give the panels a test run to see how much heat it generates in a still room. While I can put a fan at the top of the tent to make for better convection at the heatsinks, if the best thing is to add a fan, I can do that, I was just hoping to simplify things by...

Good info there for me. I'm not familiar with the driver technology for COBs and if it was DC, distance from the COB and gauge of wire would be critical. So it's either pulsed DC or AC that you can remote it. That's good to know. I'll remote them and save me some grief. Thanks!

I've seen a couple of the Youtube versions of the filters now and they seem doable. One looks like a particularly fine design but if the container falls over when bumped, it would leave a real mess. I like the design though and think I'll use it but will add a coarse filter to the intake so it...

I've decided to use a 5.886 x 36" heatsink http://www.heatsinkusa.com/5-886/ with the 4 COBs running at 50W each and spaced 8" apart with 2" spacing on each end. I'm wondering if this should be sufficient for passive cooling? I have 120MM fans if need be but would prefer to keep it simple and...

Thanks for that. I'll see what I can find on youtube, never thought about making one, the ones at the grow store look real nice, if I can make one that's as good, I'll be better off for it.

@Vertical - Any suggestions on a reliable & quiet inline fan? I looked at some of the reviews on Amazon about the Ventech 6" and a lot of them mentioned the fan was noisy. Also, some mention of the VenTech filter being light on carbon & charcoal blowing out of the canister & making a mess...

I'm guessing they are both going to be pretty quiet if I slow the speed down. I'll be having nice efficiency with the LEDs so the heat will be lower and I won't have to cool so aggressively as with HPS. Definitely want to get the odor out! Sounds like the larger unit is the way to go. OK, what...

I thought I might be able to get away with not using a tent but the scent is getting to be pretty strong so to keep everyone happy I need to enclose it and filter the air. I'll be using 400W of COB lighting, maybe I'll add another 200W, but not just now. Since I hadn't planned on this I'm...

That's the bugger for me; If I put 8 50W COBs on one heatsink or 4 50W cobs on a heatsink, which size heatsink is best for 4 COBs and which size heatsink for 8 COBs to live on one heatsink? I'll be using a 200MM fans for cooling.

Running at 50W for each COB, I'm trying to decide on the size of the heatsinks and it comes down to putting 4 COBS on one 10" x 12" heatsink and making three of them, or making one large 10" x 24" with 4 3000K & 4 3500K on it for bloom and one" 10 x 12" with four 5000K for veg. The COBS &...

@ Supra, Thanks again for the info. I still haven't received the tracking # so maybe they haven't shipped yet (Jerry). If I can get the 36V COBs instead, wouldn't I take a hit in lumins? it seems like 23W as opposed to 50W would be much less output. Or, would the output be about the same? It...