The Wattstopper LMLS-500 is a DLM open loop multi-zone photosensor that measures daylight contribution to automatically switch or dim multiple lighting zones in commercial applications. Its open loop methodology evaluates incoming daylight independent of electric light output, providing reliable daylighting control for perimeter offices, classrooms, and atrium-adjacent spaces. Connects directly to the DLM Cat5 local network for plug-and-play integration.