Hey sup everybody?
I've been using LEDs for a while now and I don't see a lot of info out there, so I thought I'd share some of mine.
I use 10mm .4 watt LEDs... Red, Blue and UV. I power them with a Radio Shack 13.8v 25amp power supply.
I use this website's LED array diagram wizard to design them.
LED series parallel array wizard
I use on-wall wire covers and drill/dremel 10mm holes 1 inch apart. I cover it in mylar and drop in the LEDs. I like to make bars instead of panels, so I can limit the amount of Red light my plants get. And when I flower I add twice as many UV bars as I have Red/Blue, but only when I flower.
-Loki