I have a 150-watt high pressure sodium security light that mysteriously began cycling on and off about a month ago, after about three years of faithful operation.
Thought the photoelectric cell might have gone bad, so I replaced that.
I suppose my next move will be to try a new bulb, but these things are supposed to last much longer than this one's been in service.
Do these things have some kind of ballast or starter that might have gone bad?
Any ideas on what's causing this on/off cycling?
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