Linear Fluorescent Bulb Bulb Base Type Medium Bi-Pin (G13) Bulb Housing Glass Bulb Shape T8 Color Rendering Index 85 Color Temperature 3500K Lumens 2 400 lm Light Technology Fluorescent Nominal Length 4 ft Shatter-Resistant No Watts 25 W Voltage Ballast Dependent Standards Meets 2012 Lighting Legislation Energy Standards TCLP Compliant ANSI Code 1028-1 Bulb Minimum Starting Temperature 32 Degrees F Bulb Start Type Instant High Output No Overall Length 48 in