What happened to this GE quarts halogen lamp, lamp engineers?
- From: itsme.ultimate@xxxxxxxxx
- Date: Fri, 29 Jun 2007 08:06:50 -0000
X-No-Archive: Yes
The lamp looked like this for a long time, but it eventually gave up
today. On a closer look, it looked worse. It was used with a
dimmer. It is the 150W version of the common doubled ended 300W
halogen lamp used in torchieres.
The imprint says:
K28 120V
GE Q150T21/2CL
HUNGARY M8
It is from sometime in the 1990s.
about 3/8" of both ends turned opaque white. It is clean white when
you look at the inside wall from the side. Has a light dull yellowish
tint looking from outside wall. It looked like this for a long time
before it finally gave away.
http://img243.imageshack.us/img243/1889/halogen1ot1.jpg
Hot sections of filament turned dark blue like steel oxidized at high
temperature.
http://img401.imageshack.us/img401/3731/filamentmy8.jpg
The inside is blackened on top. Perhaps the lamp was frequently
operated at a temperature too low to sustain the halogen cycle, so
tugsten deposited on the wall, but wouldn't full power operation scrub
this off?
The darkening isn't really that mysterious, but I have no idea what
happened with the blued filament and whitened ends. Perhaps air got
in?
http://img243.imageshack.us/img243/6170/darkspotsfn1.jpg
.
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