The EK4436SM is an electronic photocontrol that fits standard ½" trade size knockouts in standard outlet boxes and wall pack lighting fixtures. It is made of a Zinc Die Cast Metal housing that stands up to outdoor environments and features a silicon light sensor with a zero-crossing circuit to provide a long service life.PRODUCT FEATURES:- Dusk-to-dawn control of outdoor lighting, floodlights and security lighting- Ideal for LED fixtures totaling 1650 W @ 277 VAC- Non-drifting silicon light sensor IR filtered for human eye response- Zero-cross technology helps device withstand severe inrush current andextend relay life- Exceeds 10,000 ON/OFF operations at full load to meet life expectancyof LED fixtures- Adjustable directional light hood included- Zinc Die Cast Housing- All components meet 15-year life requirements