Osram 20584 Sylvania 20584-FT40DL/830/RS/ECO-40 Watt CFL Light Bulb-Compact Fluorescent-4 Pin 2G11 Base-3000K Fluorescent bulbs are energy saving bulbs and last up to 10 times longer than incandescent bulbs Fluorescent bulbs help you save money using 40 - 70% less energy than incandescent bulbs Fluorescent bulbs are 5-8 times more brighter (more output lumens /watt) than incandescent bulbs Sylvania Single Tube 4-PIN fluorescent bulb, 40W, Base: 2G11, Color Temp: 3000K, Rated Life (hours): 20000