Semiconductor-based LEDs have reduced electricity consumption for lighting by a factor of five compared to incandescent bulbs.
Notes on verification
DOE and ENERGY STAR confirm LEDs use roughly 75-80% less energy than incandescents, which corresponds to a 4x-5x efficiency improvement. The 'factor of five' figure is at the high end of commonly cited ranges but consistent with typical lumen/watt comparisons.
Sources
- L’électroluminescence du graphène, une découverte inattendue (inp.cnrs.fr)
- https://www.energy.gov/energysaver/led-lighting (energy.gov)
- https://www.energystar.gov/products/light_bulbs (energystar.gov)