Standard round back cylidner, yet still on the smaller side. A nice feature of this fixture is that it accepts various lamps and wattages.

PAR20 Round Back

Finish: Black or White
Lamp: PAR20 Halogen or R20 Incandescent (50, 75 or 100-watt)
(sold separately)
Accessories Available: LCTA70 Barndoor
UL/C-UL Listed