Juno Lighting R551WH Trac-Lites Flared Steps Line Voltage 50W PAR20 Lamp Holder, White Finish On/off Switch Included, Spring-loaded Locking Latch with Embossed Polarity Arrows Secures Trac Light to Trac Medium-base Porcelain Socket with Nickel Plated Copper Screw Shell Uses one 35- to 50-watt PAR20 lamp 90-degree vertical aiming capability and 358-degree rotation Copper alloy contacts provide precise spring action