Description LMU 48-24 ON/Off 6Live 100AMP  1ph feature a main circuit breaker that automatically triggers in the event of an electrical overload. Ballasts, lamps, other devices and even the LMU itself are protected by this system. Medium to large LMUS feature a soft start function that staggers the start up of lights in order to reduce start up load on the circuit. Made with the highest grade materials to add durability to the unit, as well as providing passive cooling for internal components.