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Old 06-06-2013, 11:07 PM   #1
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Recessed Light Bulbs Keep Turning Off and On


I installed 2 Halo 4" recessed lights in a bedroom that I am renovating. One is working perfectly but the other one (the last one in the string) keeps turning off and back on. I did some troubleshooting and its not a bad bulb. I do notice that when the lights is dimmed it doesnt appear to go out,only when it is at full brightness.

Could it be that it is overheating and shutting down until it gets cooled? If so why is it only happening to onw light? I have a 60watt bulb in it, is that to big for the can?

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Old 06-06-2013, 11:40 PM   #2
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Recessed Light Bulbs Keep Turning Off and On


There's several recent threads on these dimmable, CFL, LED problems. See if you can find any clues from those.

I have no idea how this new crap works. I'll stay tuned

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Old 06-07-2013, 12:11 AM   #3
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Recessed Light Bulbs Keep Turning Off and On


Best way to know for sure is get a voltmeter and measure the voltage at the fixture.
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Old 06-07-2013, 01:30 AM   #4
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Recessed Light Bulbs Keep Turning Off and On


Inside the can is a label that tells you what the max wattage is for the trim you are using.
But, IIRC, the max of any bulb for the 4 inch is 50 watts. So I would recommend a lower power bulb.
IF it is going out and then taking a while to come back on, you could be going out on over temperature.
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Old 06-07-2013, 01:41 AM   #5
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Recessed Light Bulbs Keep Turning Off and On


Quote:
Originally Posted by VinnyBags View Post
I installed 2 Halo 4" recessed lights in a bedroom that I am renovating. One is working perfectly but the other one (the last one in the string) keeps turning off and back on. I did some troubleshooting and its not a bad bulb. I do notice that when the lights is dimmed it doesnt appear to go out,only when it is at full brightness.

Could it be that it is overheating and shutting down until it gets cooled? If so why is it only happening to onw light? I have a 60watt bulb in it, is that to big for the can?
I wrote the answer there ya got 60 watt bulb and what kind of trim you have on this recessed luminaire ??

Most useally are rated for 40 or 50 watts the most.

So try with 50 watts bulb if you can find them and is any insulating materals is on the top of that recessed luminarie ?

Merci,
Marc
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Old 06-07-2013, 07:40 AM   #6
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Recessed Light Bulbs Keep Turning Off and On


The fixture has a sensor in it to turn off the power if it gets too hot. It automatically resets when it cools off.
If you put too large a lamp in the fixture or covered it with insulation when it is not rated to be covered that could be the cause of the overheating.
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Old 06-07-2013, 08:57 AM   #7
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Recessed Light Bulbs Keep Turning Off and On


Thank you everyone for the replys. I will try a lower wattage bulb. But why is it only happening to one of the lights? There is no insulation near the lights. In fact there is not even a ceiling right now they are in open bays. The. One having the issue is 2 feet from the outside wall by the window, maybe there is more heat buildup in that area?
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Old 06-07-2013, 09:00 AM   #8
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Recessed Light Bulbs Keep Turning Off and On


just a shot in the dark, here, check that your wiring connections are good and tight.
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Old 06-07-2013, 10:36 AM   #9
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Recessed Light Bulbs Keep Turning Off and On


There is a possibility the sensor is bad. yes, new fixtures can have issues right out of the box.
Check lamp, then check sensor.
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Old 06-07-2013, 10:39 AM   #10
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Recessed Light Bulbs Keep Turning Off and On


Quote:
Originally Posted by joed View Post
The fixture has a sensor in it to turn off the power if it gets too hot. It automatically resets when it cools off.
If you put too large a lamp in the fixture or covered it with insulation when it is not rated to be covered that could be the cause of the overheating.
Quote:
Originally Posted by J. V. View Post
There is a possibility the sensor is bad. yes, new fixtures can have issues right out of the box.
Check lamp, then check sensor.

....
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Old 06-07-2013, 10:40 AM   #11
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Recessed Light Bulbs Keep Turning Off and On


How do I check the sensor
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Old 06-07-2013, 10:42 AM   #12
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If the sensor is bad. How do I check to confirm
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Old 06-07-2013, 10:50 AM   #13
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If the sensor is bad. How do I check to confirm
Practically, you can't.... (I suppose theoretically you could get some specs, and measure temp when it cuts out.)... but I'd just try another unit.

It's that little silver (maybe 1"long, 1/2 wide) box clipped into your light can and wired in series. I believe its just a thermocouple.

But probably best to just put the aappropriate light in it. Note if you get a directional light (par 20 maybe) verse an A19 incandesent, that may solve the overheat issue. Also, a cfl will solve the problem.... but raise alot of compatibility issues with your dimmer.
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Old 06-08-2013, 10:29 AM   #14
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Recessed Light Bulbs Keep Turning Off and On


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If the sensor is bad. How do I check to confirm
Okay. Jump it out and see if the fixture stays on. (bypass the sensor)

Do not leave the sensor jumped out. It could be dangerous. Remove your jumper or reconnect immediately after testing!!!!

Please be careful!!!!!!!!!!!!!!!!!!!!!!
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Old 06-10-2013, 10:41 AM   #15
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Recessed Light Bulbs Keep Turning Off and On


Thank you everyone for all your great comments. I put a 40 watt spot in the can and it seems to have fixed the issue. I have it on for hours at full and it did not click off.

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