Linear Fluorescent Bulb, Bulb Base Type Miniature Bi-Pin (G5), Bulb Shape T5, Color Rendering Index 85, Color Temperature 3500K, Lumens 2,813 lm, Light Technology Fluorescent, Nominal Length 4 ft, Shatter-Resistant No, Watts 28 W, Voltage Ballast Dependent, Standards Meets 2012 Lighting Legislation Energy Standards, Bulb Minimum Starting Temperature -4 Degrees F, Bulb Start Type Rapid, High Output Yes, Overall Length 45 1/4 in, Rated Life 36,000 hr, Trade Number F28T5/835/ECO/CVG