Feit Electric 23-Watt (100W) GU24 CFL Light Bulb Featuring a spiral design and a twist-lock base, the Feit Electric 23-Watt (100W) Mini Household CFL Light Bulb (E)* is designed for use in interior and exterior spaces. The soft-white bulb provides the lighting equivalent of a 100-watt bulb in an efficient design to help you save on energy costs over time. Life: 9 Years (Based on 3 hrs/day) GU24 spiral shape with a twist-lock base Energy Star approved