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#205221 - 02/06/12 03:48 PM Residential short lamp life?  
cgw  Offline
Member
Joined: Jul 2004
Posts: 133
Rochester NY
Are there any possible reasons for what seems like a short lamp life of incandescent and low voltage lamps?
For example a dining room fixture was replaced in part because the incandscent lamps were burning out too often. But now the MR16 lamps in the new fixture seem to be failing too often.


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#205222 - 02/06/12 04:15 PM Re: Residential short lamp life? [Re: cgw]  
LarryC  Offline
Member
Joined: Jul 2004
Posts: 783
Winchester, NH, US
Three leading causes of short tungsten lamp life are high voltage, excessive shock / vibration, and high heat.

Is the fixture on a light dimmer? Turning down the voltage even 10% can double lamp life.

Is there alot of pounding, dancing, or jumping up and down directly above the fixture? Excess bass thumping? All of these can shorten the bulb life.

Are there covers or add on shades that can trap the lamp heat? Are you using the lamps in the correct orientation? Some bulbs require burn base up or burn base down.


Are you using photgraphic bulbs. Many of the special light color lamps only have a limited life of 50 or 100 hours.

Last edited by LarryC; 02/06/12 04:22 PM.

#205223 - 02/06/12 04:20 PM Re: Residential short lamp life? [Re: cgw]  
HotLine1  Offline


Member
Joined: Apr 2002
Posts: 6,864
Brick, NJ USA
Larry has it covered. The 'bargain price' bulbs have short life spans also.

Most of my incandescent lamps home are on dimmers, and I can't complain about burn outs.


John

#205248 - 02/07/12 01:30 AM Re: Residential short lamp life? [Re: cgw]  
mbhydro  Offline
Member
Joined: Feb 2003
Posts: 347
Winnipeg MB Canada
Had a local pizza restaurant that was loosing bulbs in wall fixtures because of the kitchen swing door being slightly out of alignment and banging on the frame.

Told the owner (I was a regular customer) tighten the hinge screws and your bulb problem should go away. He did and it was good until the suntan place next door caught fire and burned the strip mall.


#205249 - 02/07/12 02:46 AM Re: Residential short lamp life? [Re: cgw]  
gfretwell  Online Content


Member
Joined: Jul 2004
Posts: 9,117
Estero,Fl,usa
130v bulbs will last longer too.


Greg Fretwell

#205253 - 02/07/12 08:34 PM Re: Residential short lamp life? [Re: gfretwell]  
mikesh  Offline
Member
Joined: Jun 2006
Posts: 613
Victoria, BC, Canada
Originally Posted by gfretwell
130v bulbs will last longer too.

Yes they do and give less lumens at 120 volts which can be perfectly acceptable.
Obviously confirm the voltage is stable and within spec. When all else is good then cheep bulbs are not cheap if you have to change them often. That said, even good quality lamps have defects on occasion.


#205315 - 02/10/12 12:41 AM Re: Residential short lamp life? [Re: cgw]  
Trick440  Offline
Member
Joined: Aug 2005
Posts: 248
Waterford, MI, USA
Planned obsolescence was started with the light bulb.


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