Megaman have produced these mini low energy bulbs which are designed to look like and replace existing GLS tungsten halogen lamps. They are rated at 11 watts, which is the equivalent to 60 watts of tungsten halogen light.Energy savingOperating at a lower wattage, but delivering the same light out put means your running costs will be lower. They have an 'A' energy rating, the highest available. With an impressive 15, 000 hours average lamp life, it will be a very long time before these lamps need changing, which cuts your maintenance costs and makes them ideal for hard to reach areas.Choice of capWe stock both bayonet and screw cap, the most popular and widely used. Please note: These lamps are not suitable for dimming or for use with dusk to dawn sensors or timer switches.