A photocell is a light operated switch that switches the supply ON a luminaire when the light level falls under a pre-set value (usually Dusk) and switches the supply OFF when it rises above a pre-set level (usually Dawn). Photocells help to drive down costs and improve energy efficiencies by ensuring lights are not on when not needed. · · · Photocells provide dusk-dawn operation of external lights · · All UV stabilised polycarbonate construction · · Operating voltage 198V to 264V 50Hz · · Offers excellent energy/cost saving · · Consumes less than 0.5W (Day and Night) · · 1000W (4A) max resistive load · · 500W (2A) max inductive load · · 70/105 lux level (positive switching ratio to suit commercial applications) · · Photodiode sensor · · UK manufactured and product tested