Linear Fluorescent Bulb Bulb Base Type Medium Bi-Pin (G13) Bulb Housing Glass Bulb Shape T12 Color Rendering Index 87 Color Temperature 4100K Lumens 2 500 lm Light Technology Fluorescent Nominal Length 4 ft Shatter-Resistant No Watts 40 W Voltage 120V AC Bulb Start Type Rapid High Output No Overall Length 47 3/4 in Rated Life 20 000 hr Bulb Power Source Requires Separate Ballast Trade Number F40CWX Bulb Dia 1 1/2 in Dimmable Yes Light Color White