CFL bulb offers to save you 75 percent in energy costs. To hide the pigtail design, the bulb is encased in a cover that makes it look like a regular A19 incandescent bulb in case passersby can see the bulb. Medium base is designed to fit standard sockets. 14 watt bulb (60 watt) lasts up to 8,000 hours with 800 lumens and 2700 Kelvin for soft white light.