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My grandfather had a light bulb that was pretty much eternal. He bought it second-hand in the '40s and, in the '90s, it was still working! Not very bright, mayb
by nikolay 10y ago
My grandfather had a light bulb that was pretty much eternal. He bought it second-hand in the '40s and, in the '90s, it was still working! Not very bright, maybe 30W equivalent, but it worked all the time in a 4-season climate.
- ars 10y agoThat's not surprising, the lower the efficiency of the bulb the longer it lasts. I bet the filament is very large, so each piece of it is not very hot.