Osram Sylvania 20316 Cf7Ds/E/841 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, 7W, Base: 2G7, Color Temp: 4100K, Rated Life (hours): 20000