Read the "Minimalist Multi-Chip Led" thread. It contains everything you need to know.
I have some bad news i used that led one my 29 gallon, i also buildt a spectrometer and notised that the led got a realy big spike in the red spektrum. My problem was that the big spike in red light made my acropora turne brown and some almost died. I changed to 3x10w 6500k, 3x10w 455nm and 3x10w 470nm i use the same driver as you. My acroporas colored up and tings starts to looks good. You kan altso get a 100w hybrid led, whit 1/3 20k K and 2/3 455nm. Best of luck
Dan
Norway
I'm not sure that is the issue. If anything, a spike at 660nm is desirable.
What size/color is that MH bulb? The Multichip seems really white for a "20k" but might be your camera.
hey i see you have had the chip for close to a month now. I was wondering if you could give us an update.
I ordered my self a 10w blue hybrid floodlight for my fuge just to try it out. I am not sure how the color spectrum is gonna work out though.