I use wavepoint bulbs. I know theyre not listed as an option on the poll, and i know alot of people turn their noses up at them, but from what i've experienced theyre great bulbs and for $10 a piece are by far the best bulb for the money. On my 45 gal i use (2) 12,000k, (2) Blue waves (a really bright 460 nm), (1) 420 actinic, and (1) coral wave (a really bright purple bulb that peaks at 420nm but also has peaks in the red and blue ranges). The resulting light is bright white/blue prolly around the 20,000k range with just a hint of purple that goes along way in bringing out the colors of my corals.
The only downside with the wave point fixture is that it only has one power switch for all four bulbs. So I added a 2 bulb coralife fixture that isnt high output but for the 460, and 420 bulbs i have in it is more than bright enough for the desired dawn/dusk effect.