You should be fine with T-5 fixtures from HD, yes. But I'll let you get verification from soemone else.
screw bulbs are only available to screw into an incandescent socket. You can get CF
fixtures though, that pack about as much light as T-5. They will run you about $140 bucks.
I would not attempt keeping corals under incandescent or regular flourescent bulbs, they just aren't strong enough. If you can get a few screw in CF
bulbs over your tank, that should be fine.
and welcome to AA.
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