FeaturesMechanical bimetal switch with cadmium sulfide photocellCompact size fits into standard outlet box, post lamp, wall pack and other lighting fixturesDelay feature prevents unwanted OFF switching3/8 in to 18 NPSM, 3/4 in long stem with locking nut and washer gasketFront photocontrol sensor location9 in L wire lead-40 to 150 deg F operating temperature