Philips Lighting PL-S 7W/827/2P/ALTO Short Compact Fluorescent Lamp, 7 W, CFL Lamp, G23 Lamp Base, PL-S Shape
Fluorescent lamps operate at cooler temps. and more efficiently than incandescent lamps. An electrical arc passes between two electrodes at each end of the phosphor coated glass tube. When the arc mixes with the gases inside, it emits fluorescent light.