How many VHO's should I use?

[RONCGIZMO]

I have 4 2' VHO lights and a Ice cap 660 and I was thinking about running two or three of them. at first I thought about making a switching setup so I can run 4-3 or 2 off the one ballast but I'm also feeling a bit lazy about it. now I'm thinking 2 maybe 3 lights on a timer and 1 55w PC on a switch for when I need to get in the tank and the lights are off.

I have a 37 gallon tank with mostly softies, zoos, and a few SPS and LPS that are not heavy on light demand. in fact I'm running 2x55 PC's now one is a 50/50 and the other is a 10k that's much to yellow for my liking but all my coral seems to like it so far..


What would you all say?