Bulbrite 509206 CF5WW/LM 5W Low Mercury Compact Fluorescent T2 Coil with Medium Base, 25W Equivalent, Warm White Included in the box: 1- 5 watt Low Mercury Compact Fluorescent coil warm white T2's are ideal for small compact spaces 50 percent less mercury than standard Compact Fluorescent's 5 watts, 300 lumens, 80 CRI, 10,000 hour average rated life, Medium (E26) Base Dimensions: Maximum Overall Length is 3.5 inches; Bulb Diameter is 1.75 inches