Linear Fluorescent Bulb, Bulb Base Type Recessed Double Contact (R17d), Bulb Housing Glass/Metal, Bulb Shape T8, Color Rendering Index 85, Color Temperature 3500K, Lumens 8,200 lm, Light Technology Fluorescent, Nominal Length 8 ft, Shatter-Resistant No, Watts 86 W, Voltage Ballast Dependent, Standards Meets 2012 Lighting Legislation Energy Standards, ANSI Code 1501-1, Bulb Minimum Starting Temperature -22 Degrees F, Bulb Start Type Rapid, High Output Yes, Overall Length 96 in