Yes, standard bulbs. Be sure to put a flourescent (CFL) in it's place, a standard old incandescent bulb won't do a thing. Look for daylight spectrum when you're looking for the replacement bulb, but check to make sure it's got the right temperature (6500K, though I've cheated and used 5000K in a pinch). They sell some really weird things as daylight (3000K? Really?).
Careful putting two lamps on, if you add too much light you're going to get a wild algae explosion. I've met a lot of interesting types of algae by getting too light happy. :) A lamp on either side would look cool, but you'd need to put some serious space between them and the plants.
betta splendens (domestic) | betta imbellis | betta falx