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Supra, thanks again. The temps probably won't matter much for me. For me, efficiency really only matters in terms of being as green as possible. I wanted to get away from the HPS because I dislike the short tube life and that so much of the energy is lost in heat, giving so much less light...

@ Supra - Thanks for the reply. My idea was to run them at 50W each but not push them too hard, I want the longevity too. I'm looking to use COBs to equal or better a 600W Hortilux HPS. But maybe I'm misreading the info from the comments, recently I've gotten the impression I'd get more...

I'm wondering if I might have made a mistake in ordering. I just ordered: 4 CXB3590 3000K 72V 4 CXB3590 3500K 72V 4 CXB3590 5000K 72V 12 Ideal holders 12 LED 80 degree Glass Lens 3 HLG-185H-C700A Drivers And after reading a few pages back, it sounds like I would get better dispersion and...

Hi, I'm trying to decide on which heatsink I should go with. I left the details ar http://www.rollitup.org/t/realstyles-6th-diy-cxa-3590-5000k-db-bin.864284/page-17#post-12059086 I'm ready to roll cept for this. Suggestions? Thanks!

@ Realstyles: I can use some more advice if you don't mind. I'm thinking about how to best position one, two or more panels and need to decide which heatsinks to order. If I use: 4 CXB3590 3000K 72V 4 CXB3590 3500K 72V 4 CXB3590 5000K 72V 12 Ideal holders 12 LED 80 degree Glass Lens 3...

@ Realstyles I'm thinking for my purposes, making two, perhaps three panels instead of one and this will be more convenient for me. I'm about to order the components. I'll be using CXB3590 with 4 per panel. The last things I'm deciding on are 1. Is there any advantage to using 36V COBS? I do...

Hi Realstyles, Thanks. I wanted to thank you for the offer to help but I don't see a like button in the posts. I've been looking at options and wondering if 5 of the CXB3590 72V @ 3500K, driven by one HLG-185H-C700A would be an efficient use of the COBs I think this would work out to 36V with 5...

Hello Littlejacob, I'm in the states so will be buying the heatsink from here. I'm deciding between making one long panel with 8 or 10 COB or making two panels with 4 or 5 COBs on them. About the only extra expense of making two instead of one is the extra fan and apparatus. the advantage of two...

Realstyles, I came on this thread and had to read the whole thing. Very nice work and it looks very effective. I have a couple questions for now & probably will have more later, it's been a long day & I'm dogged. Where did you order your 10" x 24" heat sink from? First time I've seen COB in a...

Hi there. Was reading your experience with G8LED and didn't seem to find your conclusion on how good it was. - Did it work well for you or was it junk? Thanks!

First of all, thanks for the helpful answers. I looked at the links above and all but the one for Johnson lights took me to the lights, the Johnson page seems to be broken. Looking at the lights I'm still trying to figure out the answer to what equivalent a low watt "top end" LED is equal to...

Hi, my first post to the group. I've been trying to understand something about LEDs and perhaps I can find my answer here. I've got two 400W HPS with Eye Hortilux and considering their short lifespan and the electricity cost to run is so high, I'm looking at options. These are about 10 years...