The magical longer life and more efficient incandescent bulb was invented of course: The halogen bulb. It got around the previous physics barrier: That the h

The magical longer life and more efficient incandescent bulb was invented of course: The halogen bulb. It got around the previous physics barrier: That the hotter the filament (and therefore whiter and brighter the light), the more quickly it deteriorated to the point of failure. To me, hot as they ran (fire hazard if used improperly) halogens were the pinnacle of artificial light quality. Of course I've changed all mine to LEDs now. The LEDs give adequate light and are better in every other way. But the light from halogen bulbs was beautiful.