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Because electricity is flowing through it. If you are referring to a light that turns on automatically at night and off in the day, this is usually done with an electronic switch controlled by a photocell. However some are controlled by electromechanical timers and involve no electronics at all.
Someone who keeps the lighthouse lit at night.
Photocells are designed to work at night when it gets dark and turn off in the morning when it gets lighter. If the photocell is on during the day then it is not working the way it was designed to. Time to get a new one.
That is perfectly normal. It keeps theives away and is a security light.
A solar street light is the same as a typical electric street light; however, it is powered by the sun and is typically grid free. The solar panel provides the energy needed to run the light at night and stores the energy in a battery bank. At night, the photocell (solar panel) sees that there is no more sun available and turns the light on. The light runs during the night using the power provided in the battery bank. Most commercial solar street lights provide up to 5 days of backup storage for cloudy and rainy days.
A solar street light is the same as a typical electric street light; however, it is powered by the sun and is typically grid free. The solar panel provides the energy needed to run the light at night and stores the energy in a battery bank. At night, the photocell (solar panel) sees that there is no more sun available and turns the light on. The light runs during the night using the power provided in the battery bank. Most commercial solar street lights provide up to 5 days of backup storage for cloudy and rainy days.
Shoot it. Or move.
try the interior light switches on the doors
If your facing it then you can get hurt by the light coming out of it going into your eyes all night
Red sky at night means its going to rain.The shepherds like this because it keeps the foxes away. Red sky in the morning shepherds warning means Its going to be a nice day, and watch out the foxes are around
If the fixture is a photo cell driven device at night when this happens the most likely cause is the photocell is seeing a light source from its self. Reposition the sensing head so that the light from the bulb is not reflected into the photo cell. The cycling is caused by the unit thinking it is daytime when the light is on so it shuts off. When it shuts off it thinks it is night time and turns on. <<>> The light bulb might be about to call it quits, or you might have an electrical fault. Try changing the light bulb; if this makes no difference, you'll need to call an electrician.
You are boating at night you see a single white light directly ahead, you should give way by going around the other vessel.