UL and CUL approved for damp locations. "T" lights are top mount incandescent fixtures. "F" lights are vertical side mount fluorescent fixtures. Top mount fixtures have a beveled mirrored front. Top mount fixtures use G161/2 candelabra base bulbs, 15-40 W. Vertical side mount fixtures use one F20T12 warm white 20-24 W fluorescent bulb. Vertical side mount fixtures are sold individually, but typically used in pairs. Vertical side mount fixtures are modular - cabinets can be joined with these fixtures. Both top and side mount fixtures have silver or white finish. CDL20T light kit shown with CDC2026F