At night, the built-in motion sensor turns on the flood light when it detects motion in its coverage area with its 180degree detection angle. During the day, the built-in photocell sensor saves electricity by deactivating the floodlight. Features: - Reflective Halogen - Resistance Aluminium Housing - Power by 230V - Check the Tube Wattage before using - 180 Degree 12M Sensor - comes with c lass 400w bulb C lass 400w bulbs are the same power as 500w but they are more energy efficiant. There is one bulb included with the light