Versatility in commercial applications Low noise for indoor use;Two dual voltage configurations available: 120V/277V for the U.S market and 120V/347V for the Canadian market The Philips Advance line of F-can HID ballasts comes in two dual-voltage configurations for the US and Canadian market. Ballasts for these luminaires are most often encased and potted in fluorescent ballast type cans. Utilizes UL Class A (90C) insulation;Has built-in, automatically resetting, thermal protector which disconnects the ballast from power line in the event of overheating Offices, schools, and retail stores