Light bulbs burning out

03-18-2009, 10:12 PM	#1
Michblaze02 Newbie   Join Date: Mar 2009 Location: Michigan Posts: 20	Light bulbs burning out Again I was over helping a friend with some light fixtures. Their light above the sink says it is rated at 120v 75w. The bulbs they are using are a 65w, yet they are burning out within a week. Are they maybe a bad batch of bulbs, can't think of anything else since the wattage is lower then the max for the fixture.

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03-18-2009, 10:17 PM	#2
NolaTigaBait Member   Join Date: Mar 2009 Location: New Orleans,LA Posts: 128	Light bulbs burning out Quote: Originally Posted by Michblaze02 Again I was over helping a friend with some light fixtures. Their light above the sink says it is rated at 120v 75w. The bulbs they are using are a 65w, yet they are burning out within a week. Are they maybe a bad batch of bulbs, can't think of anything else since the wattage is lower then the max for the fixture. more of a voltage thing...get 130 volt bulbs they have sttronger filament...you need to check the voltage...but, if i had to guess you have a bad batch of bulbs

03-18-2009, 10:29 PM	#3
Michblaze02 Newbie   Join Date: Mar 2009 Location: Michigan Posts: 20	Light bulbs burning out Quote: Originally Posted by NolaTigaBait more of a voltage thing...get 130 volt bulbs they have sttronger filament...you need to check the voltage...but, if i had to guess you have a bad batch of bulbs It was sitting at 122v consistently. So same wattage bulbs with a higher voltage rating . Could anything else cause bulbs to blow so quick.

03-18-2009, 10:41 PM	#4
NolaTigaBait Member   Join Date: Mar 2009 Location: New Orleans,LA Posts: 128	Light bulbs burning out Quote: Originally Posted by Michblaze02 It was sitting at 122v consistently. So same wattage bulbs with a higher voltage rating . Could anything else cause bulbs to blow so quick. i'd try a different brand of bulb

03-18-2009, 10:46 PM	#5
Michblaze02 Newbie   Join Date: Mar 2009 Location: Michigan Posts: 20	Light bulbs burning out I will let them know. The white plastic around where the bulb goes in was a bit discolored as well. Signs of it being rather hot, would a higher voltage bulb with lower wattage help with lowering the heat output from the light.

03-18-2009, 11:02 PM	#6
Yoyizit It was a dark and stormy     Join Date: Jul 2008 Location: NW of D.C. Posts: 5,954	Light bulbs burning out Vibration could shorten lamp life, as could a loose connection. That is a very short lifetime. 122 volts into a 120v bulb should give you 100[(120/122)^14] = ~80% of rated lifetime and 44% for a 115v bulb. Last edited by Yoyizit; 03-18-2009 at 11:07 PM.

03-18-2009, 11:04 PM	#7
NolaTigaBait Member   Join Date: Mar 2009 Location: New Orleans,LA Posts: 128	Light bulbs burning out Quote: Vibration could shorten lamp life yeah,do you live under an interstate?

03-18-2009, 11:22 PM	#8
vsheetz Member   Join Date: Sep 2008 Location: SoCal Posts: 1,663	Light bulbs burning out One time my wife brought home a quanity of light bulbs that were on sale - cheap. They did not last long at all - seems I spent the next year or two doing nothing but changing light bulbs until I used them all up.

03-18-2009, 11:31 PM	#9
Yoyizit It was a dark and stormy     Join Date: Jul 2008 Location: NW of D.C. Posts: 5,954	Light bulbs burning out Quote: Originally Posted by NolaTigaBait yeah,do you live under an interstate? Or have a honeymoon couple upstairs?

03-19-2009, 01:41 AM	#10
InPhase277 My License Ain't 4 Sale..   Join Date: Feb 2008 Location: Atlanta, Ga/Hamilton, Al Posts: 1,813	Light bulbs burning out If the heat can't escape effectively, lamp life can be reduced substantially. Vibration can also be a problem. Voltage too, of course.

03-19-2009, 06:19 AM	#11
Michblaze02 Newbie   Join Date: Mar 2009 Location: Michigan Posts: 20	Light bulbs burning out Quote: Originally Posted by InPhase277 If the heat can't escape effectively, lamp life can be reduced substantially. Vibration can also be a problem. Voltage too, of course. It is definitely getting warm under the glass housing. I guess a lower wattage bulb would help somewhat with that. No vibration though, they live on a quiet dead end road, and ranch style house.

03-19-2009, 12:39 PM	#12
Yoyizit It was a dark and stormy     Join Date: Jul 2008 Location: NW of D.C. Posts: 5,954	Light bulbs burning out Quote: Originally Posted by Michblaze02 It is definitely getting warm under the glass housing. I guess a lower wattage bulb would help somewhat with that. No vibration though, they live on a quiet dead end road, and ranch style house. Vibration as in people stomping around upstairs while the light is on, or doors slamming close by while the light is on.

03-19-2009, 01:18 PM	#13
NolaTigaBait Member   Join Date: Mar 2009 Location: New Orleans,LA Posts: 128	Light bulbs burning out Quote: Originally Posted by Yoyizit Or have a honeymoon couple upstairs? \hahah...nice one