These Energizer Halogen GLS Bulbs offering an 85% energy saving versus normal bulb. The bulbs are a true retrofit design, provide instant, flicker-free light and have an average rated life of 15,000 hours. This Energizer Halogen Halogen Linear GLS Bulb has the following specification: Fitting: R7S Input Wattage: 120 W (150 W equivalent) Lumens of Light: 2250 lm Colour Temperature: 2900 K (Warm White) Lamp Dimensions: 78 X 8 X 8 mm Dimmable: Dimmable Rated: G Switching Cycles: 40,000 Average Rated Life: 15,000 hours