TCP 1822351K CFL Spring Lamp - 100 Watt Equivalent (only 23W used!) Daylight (5100K) HPF Spiral Light Bulb TCP CFLs use 75% less electricity than their Incandescent Counterpart, while maintaining the same Light Output HPF (High Power Factor): More efficient use of electricity Color: Daylight (5100K) This bulb has the light output of an incandescent 100 Watt Equivalent light bulb, but only uses 23W of electricity Switching from your incandescents to CFL will save you $84 over the life of this item