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PostPosted: Wed Oct 24, 2018 12:41 pm 
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My aged mother complains that the 100W bulb (incandescent; refuses to use LED) in her pendant ceiling light keep blowing. They might last around 4 months. It's not a duff batch of bulbs, and none of the other pendant lights have the same problem. The bulb holder has been replaced a couple of times, but still they blow.

Problem is that when it pops, it takes out all the ceiling lights in the house. She's too frail to change a bulb herself, so has to wait for a friend or neighbour to do it for her. Luckily, she can reset the breaker so isn't sitting in darkness for the rest of the evening.

Any thoughts what might be the root cause?

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PostPosted: Wed Oct 24, 2018 1:32 pm 
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are they closed in a bit causing overheating
or above a heat source like a fire tv or cooker
what are they rated at as i though most now where 60w or less :dunno:
i know she has no interests but worth pointing out that say 3x100w bulbs burning for an average 10 hrs a day compared with say 3x12=36w will use 264 extra watts that can equate to £132 a year or about a weeks pension
even a single bulb is £44 a year

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PostPosted: Wed Oct 24, 2018 6:24 pm 
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A loose wire in the rose/holder or the light switch is arcing = leads to soot build up on the contacts

leds have come a long way in the last few years - better quality of light, a lot lower running costs, and your get a good number of hours - a lot of people confuse leds with those horrid energy saving compact florescent


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PostPosted: Thu Oct 25, 2018 11:08 pm 
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big-all wrote:
are they closed in a bit causing overheating
or above a heat source like a fire tv or cooker
what are they rated at as i though most now where 60w or less :dunno:
i know she has no interests but worth pointing out that say 3x100w bulbs burning for an average 10 hrs a day compared with say 3x12=36w will use 264 extra watts that can equate to £132 a year or about a weeks pension
even a single bulb is £44 a year


Middle of a lounge so nothing to interfere with heat dissipation.

She stockpiled 100W bulbs before they were outlawed.

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PostPosted: Thu Oct 25, 2018 11:12 pm 
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Bob225 wrote:
leds have come a long way in the last few years - better quality of light, a lot lower running costs, and your get a good number of hours - a lot of people confuse leds with those horrid energy saving compact florescent


They have, but most domestic LEDs have CRI in the low 80s. Any with CRI values in the 90s are either horrendously arty with low lumens, or pitched at photographic studios. Either are silly money.

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PostPosted: Thu Oct 25, 2018 11:15 pm 
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so no shade at all just a bulb :scratch:

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PostPosted: Fri Oct 26, 2018 9:34 am 
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look at Osram or Philips bulbs, your dear old mum wont know the difference tbh


As for light output, 100w equivalent led in the right colour will put out more lumens, A good daylight bulb will be in the 95-100 cri range


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PostPosted: Mon Oct 29, 2018 5:47 pm 
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Check the bulb holder, some are only rated 40/60 watts, also as Big-all says check any shades, some are only good for 40/60 watt bulbs as well. either of these could lead to overheating and in some circumstances bulb failure or even fire. :shock:

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