Philips 139477 42-watt Equivalent, Soft White (3000K) 15-watt T4 Spiral CFL Light Bulb Illuminate your household with soft white light with the Philips 15 Watt T4 spiral energy efficient CFL Light Bulb. Equivalent in brightness to a 42 Watt incandescent bulb, each compact fluorescent bulb emits 2800 lumens at a yearly cost of only $5.06 per year (based on 3 hours use per day). Best-in-class Energy Star Certified Philips CFLs are designed to last approximately 10,000 hours each and meet federal minimum efficiency standards. Ideal for use inwall sconces where walls are washed with soft cozy light, these lights are ideal for hard to reach fixtures where access is difficult. These Philips CFL bulbs feature a T4 shape and E26 base. Contains mercury, for information on safe disposal, please visit epa.gof/cfl