Linear Fluorescent Bulb, Bulb Base Type Miniature Bi-Pin (G5), Bulb Shape T5, Color Rendering Index 85, Color Temperature 3500K, Lumens 2,100 lm, Light Technology Fluorescent, Nominal Length 3 ft, Shatter-Resistant No, Watts 20 W, Voltage 120V AC, Standards Meets 2012 Lighting Legislation Energy Standards, Bulb Minimum Starting Temperature 0 Degrees F, Bulb Start Type Rapid, High Output Yes, Overall Length 33 3/8 in, Rated Life 30,000 hr, Trade Number F21T5/835/WM/ECO/HO, Bulb Dia. 5/8 in