Halogen lamps are designed to provide crisp white light, long life and constant lumen maintenance. The use of halogen gas enables the filament to burn slower and to operate at a higher temperature; which allows for a whiter and brighter light output. Halogen also allows for longer life and more lumens per watt making halogen lamps more efficient than regular incandescent lamps. The crisp white light of the halogen reflects very nicely on crystal, making it sparkle and enhancing the property of crystal chandeliers. Halogen lamps are dimmable and can be used in the most compact and stylish fixture designs. Many STANDARD halogen lamps have a coating that filters UV rays; but it doesn’t apply to all of them, look for the icon that identifies them.