The R111 GU10 Base 120 Volt Halogen lamp is available in a 50 watt with 24 degree beam angle (480 lumens), 75 watt with 24 degree beam angle (795 lumens), or 100 watt with 40 degree beam angle (1160 lumens). 2900K color temperature. UV protection. Twist and lock system. Precise beam spreads. Rated average life of 2000 hours. 4.37 inch diameter x 2.75 inch height.