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Old 06-04-2012, 08:50 PM   #16
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Exterior lights flashing


Thanks for all the help, folks. It appears the problem is with the photocells. I covered the photocells with putty, and now the lights stay constantly on. Doesn't resolve the issue, but at least I know what the problem is and can go from there. I appreciate you guys taking the time to help out!

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Old 06-05-2012, 05:59 AM   #17
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Exterior lights flashing


Marc has it correct. The 2-wire devices (photocells, occupancy sensors, etc) work by passing a small amount of current thru the light bulb filament (in an incandescent bulb). This doesn't work well with CFL or LED. You need a device with a dedicated neutral. The code has now changed to require a neutral in all switch boxes in the future for this reason.

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Old 06-05-2012, 07:06 AM   #18
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Exterior lights flashing


Just wondering...You indicated that there are two of these, did you try a test with one disabled to see if the other one had the same behavior? It could be that the sensors are seeing the light from the other bulb.
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Old 06-05-2012, 07:27 AM   #19
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Exterior lights flashing


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Originally Posted by busman View Post
Marc has it correct. The 2-wire devices (photocells, occupancy sensors, etc) work by passing a small amount of current thru the light bulb filament (in an incandescent bulb). This doesn't work well with CFL or LED. You need a device with a dedicated neutral. The code has now changed to require a neutral in all switch boxes in the future for this reason.

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That really isn't the point. The point is that the manufacturer installed these photocells. They should work. I would complain that they don't.
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Old 06-05-2012, 07:44 AM   #20
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That really isn't the point. The point is that the manufacturer installed these photocells. They should work. I would complain that they don't.
I doubt the manufacturer installed these photocells. The makers of these products do label them to indicate that they will only work with incandescent bulbs. You can't blame the electrician who installed it either, since he installed the product properly. The only solution is to have at least one incandescent bulb on that sensor. The rest can be CFL or LED.

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Old 06-05-2012, 07:54 AM   #21
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Exterior lights flashing


You didn't read the entire thread...

Quote:
The manufacturer installs the photocell when the energy star "version" of a fixture is ordered. It's installed at the bottom of the backplate.

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