Electric light bulb invention took 150 years, starting in 1700s. Only 50% of US families had electricity 100 years ago. Edison invented light bulb in 1879, but process involved multiple inventors
People believe lights should be turned off when needed, using up to 15 minutes of power. This theory is based on the assumption that lights use 100 watts per second. The actual power consumption is 30,000 watt-seconds per second
Early light sources included candles and oil lamps. Joseph Stalin invented electric arclight in early 1800s. Edison and others developed efficient incandescent bulb in 1880s. Electric power stations brought electricity to urban areas
Energy-efficient appliances reduce power costs and environmental impact. LED bulbs use 80-90% less electricity than traditional bulbs. Unplug appliances when not in use to prevent energy waste