Over at the sister-in-law's last weekend, noticed a ceiling fixture
was dark and volunteered to put in a new bulb, hero that I am. While
putting in the new bulb I noticed that the lighted switch that
controls the ceiling fixture went on (i.e. lit up). Indeed, bulb
unscrewed - switch's light out; bulb in - switch's light on. Come to
think of it, the switch's light hadn't been on before when the burned-
out bulb was in the fixture.
In short, it seems the switch's light is wired in series with the
fixture. Is that how it's supposed to be? Does that serve some
purpose? Just curious -- H
wrong answer..............the switch being lit when OFF is so switch can be
located in the dark....bedroom, entry way, garage etc........these were very
popular in the late 50s thru the mid 70s.....the tiny ne-2 neon bulb in the
switch draws less then a half watt of power.
there is a large-values resistor in series with the neon lamp to limit
the current. Turning the swiatch on shorts out the lamp and
resistor. If there is no bulb in the fixture, there is no current/
voltage to the neon lamp.
On Mon, 29 Aug 2011 17:16:32 -0700, "Harrison Lighting and Neon"
When those neon bulbd age, they become unpredictable. Some of the
older power strips have a switch lighted by a neon bulb and at least
one of mine now flashes on and off. This has no effect on usability,
it's just that the neon bulb is burning out. They all do that
eventually. I had a neon night light that oddly enough was dark when
the light was off, but flickered when I turned the light on. It just
became useless from age. Those neon bulbs are cheap and easy to
replace (in the item could be opened easily), but in many cases not
worth the time and effort. I now have a LED night light, which should
last much longer, and probably uses less energy. Neon for indicator
lights is probably dead technology these days.
Do they still sell the lighted switches????
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