Well there will be an increase in light (par) so try to start them higher above or use the screen diffuser method to decrease the initial light increase, your softies may not like the sudden change.
I run them on icecaps in lumenarc mini's and the color is just clean. I have one over my 30 breeder with sps's and one over the 75 with lps's. The par is supposed to be close to a 250. If you want a bluer look you will have to supplement prolly best with T5's so you can get a color blend you will like. The best bang for the buck I think for 175 SE. When I redo my system I will run these with T5 supplementation. I saw them on a system when I was in Pittsburgh picking up another light for a friend and bought them (reflectors, ballasts) on the spot off his SPS tank. Would not give up the bulbs so I bought new.
Lights are tricky to recommend because it boils down to personal preference and what you are ultimately trying to achieve and keep. You have to find a balance that will satisfy the end goal. There are so many choices and combo's you can run. I do not think there is one be all end all bulb. I still hem and haw over what I would like. I have friends that are die hard T5 nuts and would talk you down from halides and friends that go the other way. Best is to see them for yourself on someone's system. I bought a few other kind of MH bulbs to mess with off ebay that someone else did not like and only ran for a short while. I also like the look of hamilton 20k's but they are no where near as bright. Hope some of this babbling helps.
