Look into Reefbreeders LEDs or ever glows. Everglow makes Reefbreeders but a lot of people are more comfortable using Reefbreeders. That's what I'm look into for my biocube 29.
When I had a 28 biocube I had the hqi hood that was modded from nanotuners ..unfortunately there no longer around.basically my hood had 2 actinic power compact bulbs and 4 blue led bulbs incorporated into the hood.the LEDs where the moon lights