Defective Light Bulb

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OK now check this out. Today I get a call from a customer saying when he changed a light bulb, it blew his breaker, and then just sparked and the light went out and stayed out. I get there and find a fried dimmer, so when I connected the wires together the light works fine. So I inspect the fixture and wiring and can't see anything that would be making the fixture short or fry the dimmer or trip the breaker. So I put it all back together, everything is fine and while I'm repairing something else, The Homeowner, then replaces the 40 watt lamp with a the 60 watt lamp he originally wanted in there. BOOM! There goes the circuit breaker. So now even I'm confused. Even though this guy is an attorney, he was perfectly capable of replacing light bulbs. So I again pull everything apart and even replace the fixture with a temporary bare bulb fixture. When I turn on the switch it is still tripping the breaker with the new fixture. I then notice the bottom of the light bulb and WOW! Look at what I found! A manufacturing defect on the bottom of the bulb that left a washer embedded into glass directly under the screw shell and contact point. This was causing a direct short whenever this bulb was energized. 27 years of being in the business and I can't remember ever seeing this. Pretty cool, Huh?
 
Jeff Weissman Electric said:
Even though this guy is an attorney, he was perfectly capable of replacing light bulbs.

I've never seen that before that is crazy stuff
I can imagine how much the lawyer is going to sue the light bulb company for:grin:
 
Jeff Weissman Electric said:
27 years of being in the business and I can't remember ever seeing this. Pretty cool, Huh?
Yup.
Hang onto it.

I keep a bunch of "oddities" I have found around ....
- the nut w/o threads (if I find another one, a PITA helper is gonna spend a day trying to make it work)
- the "double male" x-cord (I would give it to Mr. PITA, but I don't want to hurt him....yet)
- my "double-twist with a flip" 1/4" Hilti bit ( took 2 complete twists OUT of the bit AND bent it 90? w/o breaking)
- etc.
 
Given the low price and even lower quality of modern A-lamps I'm not really surprised at the lamp you posted.
 
I've seen a defect in the lampholder itself that had a piece of metal connecting the tab with the screwshell. THAT one caused a bit of headscraching. Just luck I noticed it (after replacing it). Wish I had saved it.
 
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