Hey jubiare, thanks for passing all this info along. You've piqued my interest to build my own LED panel, actually! I'd also like to compliment you on your own. Very well done.
I hope you guys don't mind if I throw a couple questions out in the open for you all, though.
First and foremost, build my own panel, or Kessil H350? That GrowersHouse sale seems pretty boss, and I could supplement an H350 Magenta with some CFL's and have a pretty strong, full cycle light source. Not to mention the Kessil is stupid proof (I can't fuck up plugging the thing in, right?), it comes with a warranty, it's very compact, can sell it off used on eBay if I want (whereas who would buy a DIY LED panel made by Joe Blow on the interwebs?), etc.
Assuming you still said, "Make your own"... If I was going to build my own panel I'd be looking to buy virtually everything from one place, and right now I'm looking at Digikey. That said, the 660nm Gold Dragon's aren't available from them (yet), at least afaik. What do you think of
this model as a substitute? The 80 degree viewing angle sucks, imo, but the rest of the specs seem pretty spot on to me. They would be mated with the
625nm Dragon plus on a 450mA LED driver. Apart from that I've basically been following your lead with just a slightly higher blue/white:red ratio in mind than what you used -and no greens- in an attempt to get more even coverage of the higher frequencies.
Do you have any recommendations aside from the OSLON 660's? Another web seller who provides the 660nm Dragon Plus at a reasonable price? Maybe opt for a slightly shorter wavelength of red where there's better selection? <-- Not likely, I wouldn't think, the OSLON 660 is more efficient than their 645.
And last question. Why'd you buy those PCB stars?
http://www.icmag.com/ic/showthread.php?t=158792
It looks like this guy who was following knna as well just used some Kapton tape to insulate the LED gull wings from the heatsink, thermal epoxied the buggers on, and then wired it all up. That seems about as easy as it gets to me.
Any and all advice would be much appreciated.