(09/19/2009) - This bulb has nearly identical spectrum to the aquaconnect 14k+ for about half the price. I really consider this to be a 20k bulb... If you look at it next to other 20k bulbs such as reeflux, BLV, XM, it provides the same color rendering. It may be a little brighter than other 20k bulbs, thanks to very high PAR values. It is still nowhere near as bright (visually) as the 14k Geisemann Coral bulbs I was running before. If you need a lot of growth spectrum for SPS, get a 10k or 14k and run actinic blue and pure actinic supplements for better colors. If you want an ideal bulb for a deep water/lps system, this is it. So far, all my corals look great and are doing very well. I'm already seeing less nuisance algae than I was seeing with the geisemann coral. You can run these w/o actinic, but they will look even better with some true (420nm) actinic supplementation.

(08/11/2006) - I have this bulb in my Aqualite pro 150. Helped all my zoo's and LPS color scream!