Linear Fluorescent Bulb Bulb Base Type Medium Bi-Pin (G13) Bulb Housing Glass/Metal Bulb Shape T12 Color Rendering Index 90 Color Temperature 5000K Lumens 2 250 lm Light Technology Fluorescent Nominal Length 4 ft Shatter-Resistant No Watts 40 W Voltage 120V AC Standards TCLP Compliant ANSI Code 1010-1 Bulb Minimum Starting Temperature 50 Degrees F Bulb Start Type Rapid High Output No Overall Length 48 in Rated Life 20 000 hr Bulb Power Source Requires Separate Ballast