... to 80% energy saving 2)Excellent color rendering T3 full spiral energy saving lamps1)High luminous effciency, Up to 80% energy ... saving2)Excellent color renderingT3 full spiral energy saving lampsPower(W):11W,13W,15W,20WDiameter:T3(9mm ... 18 watt CFL canreplace a 75 watt incandescent lamp. half spiral energy saving lamp