Not to hijack the thread (apologies Sonny), but been following along here for a while now and I have to concur about T5's and coloring of SPS. I have ALWAYS been a MH, and still run my 400W 14K, but after following this build and seeing the T5's I decided to add them to what I am running as supplemental. Only two weeks ago I added 48" 4X54W fixture - got it for 100 bucks! (running ATI's: Front --Blue Plus, Pro-Color, 10K, Actinic) on to my 75G and have already seen the same thing happen to SPS (I am also the proud owner of an "always been poop brown acro" and numerous other blues, purples that have been coloring up with the T5s. And no it's not that they merely appear another color under different lighting. Since I kept the 400W MH running I can flip the T5s off and check the colors under the old lights so I have a fair comparison. I won't give up my MH (I like the rippling too much!) but T5s are just less "peaky" in terms of spectral output and allow to emphasize specific spectrums of light with the bulbs offered. I am going to have to start my own thread and show you the before and after. So thanks for the inspiration Sonny!