Wiring – Why do two of three bulbs burn out in the light fixtures

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I have two inexpensive 3 bulb light fixtures in my bathroom. The same bulb (on the end) kept burning out in each fixture. When we finally quit replacing it, the middle bulbs in each fixture eventually burned out. Now one end bulb in each fixture is, and had been working fine. Is it due to internal wiring of the fixture? Seems logical to me but I'm having a problem finding anyone to agree lol

Best Answer

I may not agree with others but many times it is the connection to the lamp that is the problem. The center conductor getting folded down a little more than the others and the lamp arcs until it no longer makes a connection.

I would try (with the power off) to lift the center tab a little. These tabs are many times brass and they do have some spring to them.

A kitchen knife to lift it up a little like 1/4” so it makes a solid connection may be the fix you need to have lamps that last closer to the same life time.

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