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DAY 2 Electronics First, I cleaned the surface of the heatsink with solvent. Then, skimmed the back of 2 cobs with Arctic Silver (#pcmasterrace). COB stuck down ±12" apart on center. Held on with thermal grease and k-tape. At this point, they are ready to be tinned and soldered. I...

DAY 1 MACHINING I cut a few 'ears' out of 1/8" soft aluminum 1 1/2" angle. These will be screwed down to the sink and provide hang points and strain relief locations. ripped some 1/2" spacers on the bandsaw. The bs came in handy for slicing up the angle as well. Clamped up the ears...

INTRO Hi all. I'm a relatively inexperienced grower, but I'm a big LED nerd so when I discovered the COB CXB3690 threads here, I got really excited. I had been growing with hardware store CFLs, and was looking for a way to up my photons cheaply. I had been wanting to build a 10w array for...