well the 50/50 is one half 10,000k and the other half actinic. If you can have 2 bulbs on and the other two off I think this bulb setup would work nicley.
Bulb 1: 10,000k
Bulb 2: Actinic
Bulb 3: 10,000k
Bulb 4: Actinic
Turn on bulb 2 and 4 about half an hour earlier than the 10,000ks and keep the actinics on for about a half hour longer. I like it as it simulates a dawn/dusk. Plus I train my coral to feed when actinics at night are on. Now when the actinics come on you can see them all ready to eat. :mrgreen:
Other wise 50/50s all the way across work very nicely too.