Philips 414078 - EL/mdT2 23W 5K Twist Medium Screw Base Compact Fluorescent Light Bulb 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 Philips Twist fluorescent bulb, 23W, Base: E26 Medium Screw, Color Temp: 5000K, Rated Life (hours):