Fluorescent T5 Ho High Performance Lamp, Designation: F54T5/841/Ho/Env, 54 WTT, T5 Shape, G5 Miniature Bi Pin Base, 24000 HR, Lumens: 5000 LM Initial, Lumens: 4650 LM Mean, 4100 Deg K Color Temperature, Cool White 85 Cri, 45-13/16 In Length, 5/8 In Diameter