Globe Electric 01402 23-Watt Ultra-Mini Compact Fluorescent 100-Watt Incandescent Equivalent Spiral Light Bulb, Soft White, 4 Pack A 23w cfl light bulb is equivalent to a 100w regular incandescent bulb it uses less energy and helps protect the environment Globe's Ultra Mini size fits all fixtures that require a standard bulb Energy Star certified, these bulbs are energy efficient Lifespan of one globe enersaver light bulb is 8,000 - 10, 000 hours Enersaver light bulbs are warranted to last 5 years