I have cheato helameda or whatever its called and an unkown algae. I tried t5 6500k and actinic, 50/50 pc, and a 5000k pc floodlight from lowes. Honestly i had the best growth under the floodlight. It was lower kelvin and lower watage but they seemed to love it go figure. Kinda makes since if u look at all the planted freshwater tanks, most of them use 6500k or below. Plants seem to thrive under more red and pink.
The only reason i put the 50/50 pc back on it is because im growing xenia in my fuge now aswell
If you search for Melev's reef, he did a comparison between 2700K, 5000K, and 6500k for growing chaeto or general refugium bulb to use, for green plants anyway.
He used the floodlight bulbs and found that 5000k was best for chaeto vs the others spectrums.
Edited by bizzarro, 26 February 2012 - 02:02 PM.