Technical History of Illumination

This document traces the evolution of artificial lighting from ancient natural light and open fires to modern LEDs, covering key milestones such as oil lamps, gas lights, carbon and tungsten filament bulbs, and the invention of the blue-violet LED. It also details technical improvements like coiled-coil filaments, inside frosting, and the transition from arc lights to incandescent lamps, highlighting contributions from Edison, Miura, and Fuwa.