A good light to get you by until you can get the more expensive lighting is the Coralife 50/50. It has the actinic light as well as regular light so you get some of the VHO effect without having two lights. I still keep a 20 long with only one 50/50, I just ghange the light at least every 6 months and I don,t have a lot of corals in it either. By the way, your reef tank is very beautiful. We are moving to CA in a year or so, and I want to set something like that up, but not until we move.