U-Bend Fluorescent Bulb Trade Number FB31T8/TL835/ALTO Bulb Housing Glass Bulb Shape T8 Color Temperature 3500K Lumens 2 750 lm Shatter-Resistant No Bulb Bend Radius 1 5/8 in Watts 31 W Bulb Base Type Medium Bi-Pin (G13) Color Rendering Index 85 Dimmable No Light Technology Fluorescent Overall Length 22 1/2 in Voltage 135V AC ANSI Code 78901-ANSI-4027-1 Standards Meets 2012 Lighting Legislation Energy Standards TCLP Compliant Bulb Start Type Rapid Rated Life 24 000 hr