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Has anyone tried something like these? http://www.ebay.com/itm/30-Watt-Cree-XPE-Blue-Red-Multichip-LED-30W-LED-Driver-For-Plants-Grow-Light-/200975207584?pt=US_Hydroponics&hash=item2ecb0e4ca0...

I've seen people talk about them I'm sure there good but it's $240 2-3x my budget. The DIY is what I was looking for but it's a little higher then I was hoping ($96.47@ ledsupply.com) is there a cheaper version somewhere? The LED's cost a bit more then I was expecting.

I could use some help. I’m going make my own led light (seems to be cheaper and I don't need a huge light) but I don’t really understand what brand/type of led/driver/lens angle I should be getting? Grow box is 4(L)x4(w)x6(h) (made for 2 plants) with a 40x1w red/blue (no...

If anyone was wondering the PCB/led's hit 105 fahrenheit with no fan/heatsink in 5 mins. With the fan/box it stayed around 92 at 15 mins. I'll do a with heatsink/longer time test once they get here. /edit 88~ inside grow box with growbox and led fan's set on mid setting.

Sorry it won't let me edit my post. My math is wrong on the last post and it would cover up the wire's/screw wholes. Could I just do a bunch of small (say 20x20) ones just on the other side of the leds? leaving alot of it bear...

:sad: whose good at the math? If I get 5x150x20, 1x150x75, and 1x28x28 that covers everything right? (with 3x3 extra) http://www.ebay.com/itm/5pcs-lots-x-150-20-6mm-Aluminum-Heat-Sink-for-LED-Power-IC-Transistor-Module-PBC-/350836644394?pt=LH_DefaultDomain_0&hash=item51af7e5a2a...

She sent it a few days ago. I'm probably going need another one I'll keep that in mind for next time.

Thanks for the help. Going order http://www.ebay.com/itm/5pcs-lots-x-150-20-6mm-Aluminum-Heat-Sink-for-LED-Power-IC-Transistor-Module-PBC-/350836644394?pt=LH_DefaultDomain_0&hash=item51af7e5a2a and...

I shouldn't need durability the box will be protecting it and 4 bolt's holding it in place. That heatsink I was eyeballing (the ebay one's) will take awhile to get here (15~days) if I order them could I run the PCB with just the fan for a while? /edit new plan: Found a AMD cpu heatsink (the...

I already orders the PCB with led's attached on it. *and box with fan is already made Couldn't I just use thermal adhesive for the two smaller heatsinks and put it on the back of the PCB? It'll cost me maybe $7 Also anyone know what temperature range the led/heatsink should be at?

I've got 40x1w leds (red/blue) on a PCB this one: http://www.ebay.com/itm/wdm-2x-HeatSink-Aluminum-Base-plate-for-40pcs-HP-leds-size-225-175mm-/171070057015?pt=LH_DefaultDomain_0&hash=item27d491ea37 It will be inside a makeshift box (a tupperware container somewhere near...

I scanned over the topic (bookmarked it for latter) so he's used 188watt worth of cree led bulbs? Being white light were mine is mainly red/blue wouldn't the PAR (Photosynthetically Active Radiation) be a factor? I know I need more going add some (90-105w led + 2x13+watt CFL) and see how that...

How many lumens would i need? I have around 3.5k lumens. If I add 2x15watt led blubs (white) it'd be just below 5k. Found some 13watt CFL laying around (800lumens each) would two of them work?

I've got a 4x4x6 grow box with a mylar bottom. *able to expand to 4x8x6 if needed but shouldn't need the room I have: 4x15 watt 3xred/2xblue LED blubs 1x15 watt 2xred/blue/green/white LED blub *I'm being cheap I only paid $2-4/blub (eBay auctions) I know these blubs aren't the best and a...