Superbly constructed by leading manufacturers these general purpose electronic lamps are designed for the rigours of professional use, with an incredible 8,000 hour lifespan and an energy saving of 78% when compared to incandescent equivalents. It may be 15 years before you need to replace this lamp! These energy saving electronic lamps are sure to deliver a return on your initial investment, when you consider that they last upto 20 times longer than a regular equivalent! You'll save money on lower energy consumption, but you'll also save on maintenance costs. Please note: Energy saving electronic lamps are not suitable for use with dimmer switches.