This Kosnic energy saving lightbulb, 240 volts, 20 watt Quick Start Spiral lamp, saves energy up to 80% comparing with other incandescent lamps.It has a long life of 8,000 hours, which is 8 times longer than your average incandescent lamp. It has been made with the highest quality of Amalgam technologies to achieve premium performance and minimum mercury HG content. It has been made with high efficient tri-phosfor coating, with excellent colour rendering and is non-dimmable.The lamp has 1 cap styles B22 with 1 colour type being a warm white. However the lamp life may reduce when used in an enclosed fitting.