still have some more to do, but for now:
3 strings of 12 crees. Decided to just go 50/50 with white/royal blue. Didn't feel like wiring up for "color" control.
Will be driving at 1amp max controlled by an APEX. Drivers powered by Meanwell ELN-60-48-D (anyone want some Ps? lol)






Top Radium (on icecap ballast) ~250watts
Bottom LED (@ 1amp or ~ 130watts)
Exposure settings are identical.
(please ignore the algae..I was so good about keeping it in check, then I got lazy and went on vacation
)


Drivers + LEDs + heatsink = ~$300
Molex connectors $4
PSU cable +CPU fans + wire + heatshrink + solder + thermal compound = free (already had)
This guy should pull about 130watts @ 1amp. The goal is to replace my 250 MH. I'll soon see if it will 
If you didn't get a deal on the drivers, LEDS & heat sink how much more do you think it would cost???
Not a whole lot more. Maybe another 10-15%.
Wow not bad. Makes me want to build one now 
Lets see how this guy does first 
Tony
what are you using to hold the crees to the heat sink? Nylon hardware?
4-40 nylon screws.
ok, that's enough work for now. I'll hook up power tomorrow 
nice work!!!!!
What's the projects over all cost?