Shelby electric incandescent light bulb from 1901 this is the same type of bulb as the centennial bulb which has been constantly burning since 1901 in Livermore California the filament in this bulb is made of carbon and it is 5 times thicker than modern filament. Hearing that the incandescent is about to be or already has been phased out because of inefficiency reminds me of this video and the Shelby light bulb these were made to last forever and a bulb that lasts forever will not be thrown away and the materials will still be in use vs a modern incandescent or light bulb where the materials are just thrown out never to be seen again. Enjoy