Sunlite 66050 50 Watt Halogen Bulb GU10 120 Volt Bi Pin Base Lamp, specially designed with an average life of 2000 hours. MOL 2.125", 2000 Hour Life, 370 Lumens, Constant Color Reflector, Cover Gard Glass For Safety, Twist & Lock Base Compatible With New High End Track Fixtures. This bulb is great for homes, offices, restaurants, and stores. Caution: This bulb gets very hot when in use. Allow to completely cool off before handling.