You can purchase what is known as a Dusk To Dawn Light. Worked for 4 nights then it started coming on and off very rapidly, like a disco light. Have a 120 volt led dusk to dawn light that was recently installed on the outside of a shed. Motion sensor security lighting uses a motion sensor and a photocell to operate your exterior light for a predetermined amount of time once motion is detected. THere are 3 lights, and all remain synched. When we moved in 3 years ago they were always on no matter which position the switch they were on was in (on/off). Maybe the dusk to dawn timer is set to come on at the same o'clock on a serendipitously-synchronized clock as the furnace thermostat clock. They did come out and fix them but it was like pulling teath. It'll turn on automatically when it gets dark and turn off again at the dawn. We have a dawn to dusk light that goes on and off all day but as soon as it's dark it stays on. Fitted a new outside light for customer and dusk to dawn lamp, the lamp keeps flashing off and on every 20 seconds. I had some electrical work done about a year ago for my new second floor air conditioner. Sounds to me (this is a guess from limitted information) that the electrictian has fitted safety lights and not dusk-dawn lights. Manually overriding your dusk-to-dawn light turns it off, while overriding your motion sensing light causes it to remain on. I installed it about 1 ft. from the overhang of the house. If the lights turn on when the breaker is off and off when the breaker is on then they are emergency lights. Because photocell-activated dusk to dawn lights sense natural light, they automatically adjust for extended and shorter nights. Motion sensors keep lights turned off unless something moves nearby. Is it possible that the light is reading the white overhand and shutting off. Dusk to Dawn light turns off and on during the day but stays on at night I recently just replaced the fixture on our post light and installed a new dusk to dawn sensor and bulb. Sometimes stays on longer. The main reason Dusk to Dawn lights don't turn on or stay on is that the sensor is frozen in the on or off position. Trying to switch outside lights that's are dusk to dawn (on garage) to just on/off lights at the switch in the garage. For 3 years in this home this never happened. I turned the power back on and the light came on and went off after about 10 seconds, but then 10 seconds later it came back on and then went off again. ... Every day I want it to come on 1/2 hour before sunset and go off 1/2 hour after sunrise. we have changed the - Answered by a verified Electrician. The old dusk to dawn lights I replaced never worked in the first place. Replaced the fixture with a different led light. Gonna try to keep this short. They are available at many home improvement stores. The lights may also be turning off frequently at night because the sensors are detecting the light from other sources or from the lights themselves. Unlike many dusk to dawn lights, they don’t activate for long periods of your time . Worked great the first night. I was not very happy with the electriction as I also had dusk 2 dawn light installed around my house and had trouble with them staying on all night or going on and off at night intermittantly. It turns on great but shuts off after about 5 minutes and then turns right back on after setting for about 1 minute. Next day it was coming on and off every other minute, all day long. Motion Sensors Lights for Outdoor. THere is no actual switch, just the dusk dawn sensor. Our 3 dusk dawn exterior lights were flickering on & off a few nights ago and now they won't turn off at daytime. I suspect that when you turned the breaker off the lights saw this as a powercut and turned on. Recently install new dusk to dawn light. 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