The PP-2PAR Alternating Power Pack alternates between two loads. When connected to remote occupancy sensors, both loads would be On during occupied periods. During unoccupied times, Load A would turn Off, while Load B remained On. Upon the next unoccupied period, Load B would turn Off, while Load A stayed On. The purpose for this would be to provide relatively even lamp wear when not all the lights are being extinguished during unoccupied periods. For example, corridors, lobbies, or public areas where some light is always desired.