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Posted by Don Young on November 17, 2007, 9:44 pm
>I have one of those common mercury vapor yard lights found on most
> farms. Early last spring it started to refuse to light and I thought
> the bulb was dead. I was not going up there with snow still on the
> ground, so I lived with out it, and just put a portable light on the
> pole. All of a sudden the yard light started to work again, and has
> worked every night all of the later spring, and all summer. All of a
> sudden the weather is getting cold again, and the light will not turn
> on. However, if I shut off the switch for a 30 seconds and flip it
> back on, the light starts and works all night long. A few days ago,
> the weather warmed up again, and the light worked again. Tonite it's
> very cold and it will not light even after I flip the switch.
>
> This is about the stupidest thing I have ever seen. Why the heck
> would it work when the weather is warm, and either struggle or refuse
> to light when it's cold weather. This is just plain rediculous.
>
> It's not the switch or power source, I checked the power and replaced
> the switch. This almost seems like a challenge for an electrical
> engineer....
>
>
>
Both the bulb and the photocell control are temperature sensitive. Replacing
one or both should solve your problem. I would suspect the control a bit
more than the bulb.
Don Young
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