Sylvania 14823 75PAR30LN/HAL/WFL/RP 120V Long Neck Reflector Lamp, Pack of 6 Bulb Dimensions: Shaft of Bulb is 2.50 inches Width is 3.75 inches Overall Length is 4.50 inches Average: Lifetime 2500 hours Lumens (light output): 1000 Dimmable: Color Temperature 3000k