Light Schedule-Help Please

[Noj]

Hey everyone, just wondering if any of you could help me out...

I have a 29 Gallon tank, 30"x12" canopy, with a single flourescent tube. 24" long, 1" Diameter

Right now I will be doing FOWLR, but I want the option of corals too, is there a light that I can use with my current hood?

In there right now is a 20W blue actinic.
What can I do with my current lighting? Is there a tube that works for corals with my hood that is good?

Also, what sort of lighting schedule should I be using? Since I dont have a timer yet. When should I turn the light on and off?
Thanks

-Cam