Juno Lighting Group R711BL R711 BL Track Light, Black Height: 5-5/8-Inch, Width: 1/2-Inch Ceramic base twist-and-lock GU10 socket with nickel plated contacts uses one120-Volt, 35-50-Watt PAR16/MR16 GU10 lamp Copper alloy contacts provide precise spring action - no arcing, will not take a set and pulls to up position for two-circuit application Drawn steel housing attached to swivel die-formed steel yoke 90-Degree vertical aiming capability and 358-Degree rotation