outdoor hard-wired post eye light control with photocell light sensor, 120-277vac 50/60hz, dusk to dawn light sensor, photocell sensor for outdoor light (ul listed)-1 pack kotlin the photocell sensor are designed to switch a lighting load on and off automatically at dusk and dawn. the units are pre - calibrated to switch at light leveis which ensure that outdoor lighting is on when required, allowing for a 10 minute warm-up period for sodium or mercury discharge lighting. <br><br> the photocell sensor suitable for use with all types of lighting, i.e. tungsten, fluorescent or discharge. <br><br> the calibration is fixed in the factory and is not variable. the units incorporate a time delay to prevent operation by car headlights, lightning etc. they are omni-directional and therefore reference to north light is not necessary. <br><br> <b>specifications:</b><br><br> power voltage: 120-277v/ac<br> power frequency: 60hz<br> ambient light: 2-50lux<br><br> <b>ratings: </b><br><br> tungsten: 120vac,5a(600w) <br> ballast: 120vac,5a(600w) <br> electronic ballast: 120vac,3a(360w) <br> tungsten: 208-277vac 600w <br> ballast: 208-277vac 600va <br> electronic ballast: 208-277vac, 2a <br><br> <b>important: </b><br><br> cell is still live when lamp is off, therefore, always isolate supply to the control before removing plug-in unit or socket or indeed beforecarrying out work of any description on the installation. in the event of breakage of the control cover-isolate control immediately from supply before unplugging-taking care to avoid any sharp deges that may remain.