I have a mercury vapor (farm) yard light on a pole. It always works fine in warm weather, but once the temperature gets below about 40deg., it dont always turn on. However if I flip the circuit breaker off and back on, the light works. Last winter it started doing this most irritating thing. I bought a new bulb thinking the bulb was failing. Before I got the bulb replaced, the weather warmed up and it has worked non-stop all spring and summer, so I never replaced the bulb. Now the weather is getting cool and it's once again not working every night, until I flip the breaker. Last night we barely had frost and the light would not come on till I flipped the breaker. What the heck is causing this? I know there are only 3 parts, the bulb, ballast, and sensor. But which would be affected by temperature?
- posted
16 years ago