Linear Fluorescent Bulb Bulb Base Type Recessed Double Contact (R17d) Bulb Housing Glass/Metal Bulb Shape T12 Color Rendering Index 75 Color Temperature 6500K Lumens 3 400 lm Light Technology Fluorescent Nominal Length 4 ft Shatter-Resistant No Watts 60 W Voltage Ballast Dependent Standards Meets 2012 Lighting Legislation Energy Standards ANSI Code 1013-1 Bulb Minimum Starting Temperature -20 Degrees F Bulb Start Type Rapid High Output Yes Overall Length 48 in