A Conversation for The World's Oldest Lightbulb

Everlasting bulbs

Post 1

Neily Peely

I read somewhere once that tungsten bulbs could last forever but that they are deliberately manufactured to 'burn out' to ensure continued sales. Does anyone know whether this is true or just an urban myth?


Everlasting bulbs

Post 2

Traveller in Time Reporting Bugs -o-o- Broken the chain of Pliny -o-o- Hired

Traveller in Time smiley - tit on his head
"That is an urban myth.

Manufacturers can produce longer lasting tungsten wire lightbulbs in a near vacuum bulb at a much higher cost. Such bulbs are for sale and last more then double the normal life, but with a manyfold higher price there is not much market. "


Everlasting bulbs

Post 3

wahiba

Running below the rated voltage helps too. Light is a bit dimmer, but often such lights are needed just to be on for ever.


Everlasting bulbs

Post 4

Michael Alexander Kearsley

LED surely is probably the closest to everlasting lightbulbs?


Everlasting bulbs

Post 5

Traveller in Time Reporting Bugs -o-o- Broken the chain of Pliny -o-o- Hired

Traveller in Tiem smiley - tit in his basement
"They surely last longer then any other 'illumination'.

I am using LEDs at the moment, they are on for more then a year by now. Though reduced about 25% in strength they will last longer then any other alternative so far. Take care not to use 'ultra bright LEDs' as those probably last less longer then 'standard' brightness. "


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Everlasting bulbs

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