Hey welcome to AA. 8)
Okay hit the lights! Um, trying to use a ballast that was originally used for T-8's isnt going to work if you want to use PC
's. The reason, some one chime in if Im wrong, is that the ballast doesn't have enough juice to fire and then maintain the PC
's. However if looking to do a DIY lighting setup a lot of companies sell retrofit kits that have everything you need. IE the reflector, bulb holder, bulb, wiring, and ballast. Makes it convienant just to hook up. Or you can buy all your pieces individually and have fun! I've heard really good things about Ice Cap Ballast's. The company says you can hook up NO, VHO
, and PC
's to it as long as you follow there total length and watt rule.
Nice link for electrical DIY.
As far as the light requirments for the tank, you will probably at least want 1 wpg
maybe 2wpg for a low light tank, and anywhere from 2 to 4.5 wpg
for a high light tank.