Compact designs, unlimited possibilities Constant lamp wattage for optimal color control and maximimum performance;Significant energy savings can be achieved when compared to incandescent or magnetic alternatives Low frequency electronic HID ballasts such as the Philips Advance e-Vision line constantly measure and adjust the wattage, optimizing delivery of the ceramic lamps' superior color properties. This makes ceramic metal halide operated by e-Vision ballasts the premier choice for many applications previously illuminated by either tungsten halogen or incandescent sources, such as retail lighting. Low frequency lamp operation;Intellivolt 120-277V input range;Metallic enclosures for optimal thermal dissipation;Smaller and lighter weight than magnetic HID ballasts;Thermally protected, internally fused, and output short circuit protected with Lamp End-of-Life shutdown Retail display and accent lighting in both track and downlights, lobbies, atriums, landscape and faade lighting