4 foot, High Output T5 lights are 54 watts each. They come in 2, 4, 6 and 8 bulb fixtures.

they are the favorite fluorescent lights...but, require plants be kept short and the lights close (SCROG)

Buying online is the best option. HID lighting is better...IF... you can control the heat.

whatever you choose...get a complete package (bulbs, fixture/reflector, cords, ballast)