The Luceco Filament Candle energy efficient light bulb is available non-dimmable. It produces instant light, is Mercury free and has an expected on/off life cycle of 15,000. Built from high quality components the product represents 85% savings in energy cost compared with a traditional bulb. The measurements of the bulb are 102mm end to end and 35mm diameter. The product is covered by a 3 year guarantee, just get in touch with us if you have any problems.