Have done my research for the required hardware. My brain hurts... BOTH Neurons!
Planning a 72lx30hx24w tank. Low Light/Low Tech.
The following is my proposed 'main' lights (series) and will be combined with a few more lower kelvin led's on separate circuits to provide sunrise/sunset/colour softening and moonlight.
9x CREE XM-L2 U3, rated at 1050lm (unknown test parameters) 8300K, white. 3A max, 3.0-4.2V. http://dx.com/p/16mm-5w-550lm-8500k-cool-white-cree-xm-l2-flashlight-lamp-emitter-board-black-235034
Harvard CC driver. 1.75A/34V. http://uk.farnell.com/harvard/clq21-240-c/led-driver-ac-dc-cc-2-1a-29-5v/dp/1974161
Am I well off base with this proposed set-up? I'm thinking of 3 clusters of 3 led's on water cooled heatsinks (heat economiser filter outlet).
I fear even with a low light set-up I might need more LED's considering a 2" substrate and led's about 4/6" above waterline. Or possibly just lenses?
Want to grow Anubias, Crypts, Java Fern for the most part. A large Sword or 2 would be nice, as would Vallis.