It sounds like they are on the same circuit or you’re having some significant power fluctuations in your house. Both are bad. The cause is likely that a power “dip” is resetting either then ambient light detector or the light itself (you didn’t say what kind it was).

Do dusk to dawn light bulbs burn out?

If the lamp continues to exhibit odd behavior even after you’ve replaced the bulbs and removed obstructions, you most likely have a bad photocell. Here’s the thing: Photocell sensors have a lifespan of upwards of 10 years. They do go bad from time to time, though, especially if they aren’t connected to stable wiring.

Why does my dusk to dawn light stay on all the time?





The bulb has a light sensor built into the base of the bulb. To trouble shoot the issue first check that the light sensor is able to receive enough light to activate the sensor.

How much power does a dusk to dawn light use?

74-watt – $0.43 per day • 100-watt – $0.41 per day/only allowed on existing lights • 150-watt – $0.43 per day/only allowed on existing lights • 175-watt mercury vapor – $0.44 per day/ only allowed on existing lights • 250-watt mercury vapor – $0.49 per day/ only allowed on existing lights The monthly fee includes all …

Do dusk to dawn lights stay on all night?

Most dawn to dusk lights are activated throughout the night, but the motion-activated lights don’t remain on that long (depending on your settings). These lights are ideal for the back garden if you have pets and for deterring burglars.

Can you adjust dusk to dawn light sensor?

Adjusting your dusk to dawn light sensor





Dusk to dawn light sensors often give you the opportunity to alter the brightness, sensitivity, and other settings on them. These give you control over them so that you can adjust them to work precisely to your liking.

How much does it cost to leave a porch light on all night?

It costs us about 10 cents per Kw depending on the time of day and the plan you are on (night-time is much lower on some plans). Assuming 10 cents, it costs us about $4.38 per month for the added security of leaving the lights on ALL of the time, not a bad investment in personal security.

Are dusk to dawn lights good?

Dusk to Dawn light fixtures are multi-use—you can put them anywhere and they are sure to do a good job. But, because their LED light technology, Dusk to Dawn light fixtures from Superior Lighting provide better light coverage than conventional light options and they last longer and consume less energy too.