It's actually for a 125 gallon tank of African cichlids. I just like the blue light to bring out some more of their colors. I think I've settled on 10 cool-white Cree XP-G and 10 royal blue Cree XP-E.
Now I'm looking at power supplies, am I correct in saying that I would need a 24V 4A power supply to run all of these LEDs?
That would be 4 1000mA BuckPucks, with 5 LEDs on each in series. I don't plan on running the cool-whites at their max of 1.5A.
What do you think I should use as a power supply?
On a side note I saw on your projects that you've also developed an aquarium controller specific for dimming lights at certain times. You said something about adding a real-time clock to it, is this something that is built into the Arduino or something that can be created through programming the chip?
Thanks much for your help, I'll be making a purchase on your website soon.