Linear Fluorescent Bulb Bulb Base Type Medium Bi-Pin (G13) Bulb Housing Glass Bulb Shape T12 Color Rendering Index 89 Color Temperature 4100K Lumens 2 600 lm Light Technology Fluorescent Nominal Length 4 ft Shatter-Resistant No Watts 40 W Voltage Ballast Dependent Standards TCLP Compliant ANSI Code 1010-1 Bulb Minimum Starting Temperature 32 Degrees F Bulb Start Type Rapid High Output No Overall Length 48 in Rated Life 24 000 hr Bulb Power Source Requires Separate Ballast