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?
on 10/12/2007 6:07 PM firstname.lastname@example.org said the following:
The MV lamp itself.
Require a maximum warm-up period of five to seven minutes before giving
full light output, depending on lamp type, ballast and ambient
temperature. They can be used only where this delay is acceptable
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.