Don't bother with the fancy stuff. Get the basic lights with the most wattage you can find. You want either the daylight or the warm light bulbs (6500K or 2700K color temperature), preferably a mix of both unless you're growing strictly leafy foliage, in which case the daylights will do you best.

Daylight bulbs are "bluer" light, which is good for vegetation.

Warm light bulbs are "redder" light, which is better for flowering/fruiting.

But for the latter you want to have a good amount of both kinds. For most plants you need a lot of light - a LOT of light. I like to put at least 3 if not 6 standard 100w equivalent (23w actual) CFL bulbs per plant for most things.

In my experience conical reflectors aren't much good. CFLs put out more light to the side than they do out the end, so you're better off putting them horizontal over your plants and using a batwing style reflector, even if that means building your own.