The problem I have with Coralife Aqualight Pro and most other HQI fixtures is that they all include magnetic ballasts. Magnetic ballasts make the bulb flicker 60x a second, are inefficient, expel a lot of heat, make nosie, and shorten life. When I pay top dollar for a fixture I expect a electronic ballast. In fact, the only fixture so far to include them is the Odyssea. Check out the reviews on Reef Central:
Reef Central Online Community - odyssea MH fixture review... new electronic version