Bulb Changes??

[bjs02ss]

Hey guys I bought a used tank and was thinking about changing the bulbs because I really dont know how old they are.

The tank has 2 power compact light fixtures on the top of it, a coral-life 4x65w and a 4x36w.

The 4x65w fixture has a different bulbs in it:
current dual daylight 65w
coral-life actinic 65w
coral-life 10000k 65 w
current dual actinic 65w

Should they be mixed like that?

The 4x36w fixture has, 4- 50/50 36w bulbs.
should I just replace these with 2- 10000k's and 2- antinic's or put 4 new 50/50's in there?

I'm kind of new to this and do not know much about corals yet. What kinds of stuff could I have with this kind of setup? ~400w total light

I have a 72G bowfront with a 10G sump.

Any suggestions/comments?

Sorry for the long post

Thanks guys,
Brandon