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Toblin

08:13AM | 10/09/02
Member Since: 10/08/02
30 lifetime posts
Bvelectrical
We remodeled two bathrooms a few years ago and installed identical light fixtures in each. Each fixture holds two 60 watt bulbs. On one of these fixtures the bulbs last only a few months before both blow out at the same time. The other fixture is still using the same bulbs after three years. Both get the same amount of use. Electrical wiring is new on both as well. Any ideas?

Electrical Inspector

02:38PM | 10/09/02
Member Since: 09/27/02
73 lifetime posts
Look for anything that would introduce vibration at that location, i.e- washer machine, doors that may get slammed,etc...

Randy Barnett

03:30PM | 10/09/02
Member Since: 09/08/02
5 lifetime posts
Check voltage at fixture, too. Operating an incandescent lamp at 10% below rated voltage can decrease life by as much as 1/3rd. This could be caused by loose termination at fixture.
Good Luck!

joefixit

06:46PM | 10/09/02
Member Since: 09/23/02
9 lifetime posts
hey randy,
I always thought operating an incandescent at a lower voltage would extend life, not shorten it. I thought thats why "long life" bulbs are rated at 130V and why bulbs on circuits with high resistance photocells seem to last forever.
brian

rpxlpx

06:55AM | 10/10/02
Member Since: 03/13/00
1675 lifetime posts
A friend of mine THOUGHT his fixture was blowing bulbs when it actually was the fixture that was bad. When it got hot (from the hot bulb) the connction was broken. Replacing the bulb gave it time to cool off. He threw away a lot of good bulbs.
Try the "bad" bulb in another fixture before you trash it.
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