Linear Fluorescent Bulb, Bulb Base Type Medium Bi-Pin (G13), Bulb Housing Glass, Bulb Shape T8, Color Rendering Index 85, Color Temperature 4100K, Lumens 2,600 lm, Light Technology Fluorescent, Nominal Length 4 ft, Shatter-Resistant No, Watts 28 W, Voltage 120V AC, Standards TCLP Compliant, Bulb Start Type Instant or Rapid, High Output No, Overall Length 48 in, Rated Life 80,000 hr, Bulb Power Source Requires Separate Ballast, Trade Number FO28/841XP/XL/SS/ECO3, Bulb Dia. 1 in, Dimmable Yes