Linear Fluorescent Bulb Bulb Base Type Medium Bi-Pin (G13) Bulb Housing Glass Bulb Shape T8 Color Rendering Index 63 Color Temperature 4100K Lumens 830 lm Light Technology Fluorescent Nominal Length 1 1/2 ft Shatter-Resistant No Watts 15.5 W Voltage 55V AC Standards TCLP Compliant ANSI Code 2008-1 Amps 0.335 A Bulb Minimum Starting Temperature 32 Degrees F Bulb Start Type Preheat High Output No Overall Length 18 in Rated Life 13 000 hr