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Posted by DerbyDad03 on January 11, 2007, 2:27 pm
Your standard fluorescent fixtures/bulbs are known for having trouble
both starting and producing full, non-flickering light in low
temperatures. Once they warm up, they may or may flicker, but they will
usually come on. When you apply current by turning the switch on and
off you are warming them slightly so they start.
I know that they make zero-degree fixtures and zero-degree tubes, but I
don't know about rings. I "upgraded" from a standard 2-bulb 4 ft
fixture in my garage to a zero degree set up with much satisfaction.
The folowing deals specifically with compact fluoresents, but most
standard fluoresents will behave the same way. From:
http://members.misty.com/don/f-lamp.html#sb2
"Like other fluorescents, operation at cold temperatures (under around
50-60 degrees F) may result in reduced light output. Starting may also
be erratic, although most compact fluorescent lamps seem to start OK at
temperatures near freezing. Many types start OK near zero degrees F.
Operation in an enclosed fixture often results in full light output in
cool surroundings after the lamp warms up for a few minutes, as long as
the initial temperature is high enough to permit a good start. However,
enclosing compact fluorescents often impairs their ability to work well
at higher temperatures."
---MIKE--- wrote:
> I have several "ring" lights in my finished basement. This is unheated
> except the heat that comes from the furnace itself so it is usually
> about 55 degrees F. When it is very cold outside (this morning was
> -2=B0F) the lights won't come on when the switch is first turned on. It
> takes two or three tries and then the light comes on. When outside
> temperatures are more moderate there is no problem. The line voltage is
> a steady 120 volts. This happens every winter. What can cause this?
>
>
> ---MIKE---
> >>In the White Mountains of New Hampshire
> >> (44=B0 15' N - Elevation 1580')
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