Compact Fluorescent Double Twin 4 Pin Lamp, Designation: CFD18W/4P/841, 18 WTT, T4 Shape, G24q-2 G24Q-2 (4-Pin) Base, 15000 HR, Lumens: 1250 LM Initial, 4100 DEG K Color Temperature, Cool White 82 CRI, 5-13/16 IN Length