well, i'm not sure how many actinicts to white daylights to use, but most people that have light fixtures with more than one bulb use a 50/50 ratio...2 whites to 2 blue actinics...but i might be wrong. Also, for the white daylight bulbs, you want to watch for the kelvin, or as on the lables of the bulbs, just K
. It will be like 10,000K or 12,000K and i think it goes up to something like 20,000K. I'm pretty sure you want something at least 10,000K for most stuff, but someone else help me on that one.
and as marc says, 3-5 is about what you want, but i think higher would always be better. Might make more algae, but some corals require very intense light.
hope this helps