Sylvania 13w T2 FM13/830 3000k Double-End Axial Fluorescent Tube Light 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 T2 fluorescent bulb, 13W, Base: Double-End Axial, Color Temp: 3000K, Rated Life (hours): 10000