l. bulbs burning out too quickly in new fixture

[shygirl40]

Hi-
I have a relatively new light fixture on the ceiling in my kitchen (which replaced one that had caused a light bulb to badly explode!) and ever since I've had it, all the bulbs I put in it keep burning out after maybe a couple of months when they should be lasting around 10 months or so (according to info provided by bulb manufacturer). The fixture takes 75 watt bulbs and I've been using 60 watt bulbs except for the last one, which was a fluorescent, 14 watt bulb. Also, and this is why I think I have a problem, the bulbs are only burning out (quickly) in -one- of the fixture's light sockets - the same one, every time (the other socket has had absolutely no problems and in fact, I have yet to change the bulb in it). I've brought the situation to the attention of the bldg. maintenance man, but he doesn't believe there's a problem. What do you all think? And what would you do about it? Thanks.

shygirl

[LazyPup]

I would begin by making sure the power is off to the fixture, then check the wire connections to the lampholder that is giving you a problem. A loose connection would result in a low voltage condition which would cause excessive heat buildup.

I would then check the lampholder itself. Is the center contact pin slightly elevated where it will make a firm spring contact with the base of the bulb, or is it flattened out in the bottom of the lampholder. If it is not making a firm tight spring contact that would also cause a low voltage and heat buildup.

Examine the theads in the lampholder, is there distortion that would prevent the bulb from screwing in tight?

If you find any problem with the lamp holder the simple solution is to replace it. They are very cheap.

[HayZee518]

Like Lazypup said, check out the center contact of the fixture. Intermittent contact creates a resistance which would result in higher current than normal and would eventualy burn out a bulb. Intimate contact between parts is essential of all parts functioning as they should.

[HayZee518]

Try using bulbs of more than the voltage the circuit calls for. I.E. 60 watts 120 volts - purchase bulbs of 60 watts 145 volts.

[shygirl40]

Thanks for the tips. I will do a little investigating like
you (both) suggested.

What is the advantage of using a bulb with a higher voltage
number (these are readibly available? Like at Wal-Mart,or
Home Depot, etc.?)?

shygirl

[HayZee518]

The voltage is your house is constantly fluctuating. It could be 117 volts or on the other hand about 128 volts. 121.6 is common. Bulbs are designed or engineered to accept voltages within a range of voltages, go over that and they're weakened for life. Higher than normal bulbs will last longer.