What is light and how does it improve our lives?
Light is the smallest quantity of energy that can be transported. According to energy.gov, “More than 150 years ago, inventors began working on a bright idea that would have a dramatic impact on how we use energy in our homes and offices. This invention changed the way we design buildings, increased the length of the average workday and jumpstarted new businesses. It also led to new energy breakthroughs — from power plants and electric transmission lines to home appliances and electric motors.” The incandescent light bulb changed the electrical landscape.
Historical Timeline of Lighting
- 1807: Scientist discover electroluminescence
- 1879: Thomas Edison patents the incandescent lamp
- 1962: First practical visible-spectrum light-emitting diode
- 1968: Mass-produced LEDs are used in TVs, calculators, radios and watches
- 1989: Ray Deese creates the first LED traffic light
- 1993: High-brightness blue LED makes LEDs a viable source of illumination
- 2007: US pledges to phase out incandescent lamps by 2014
- 2014: Nobel prize in physics awarded for invention of blue LED
Through the years, lighting has undergone significant technological advancements. Incandescent light bulbs is where it all began. In the 19th Century, fluorescent lamps were born out of an energy crisis and were showcased at the 1939 World’s Fair. As environmental stewardship continues to be an important topic, light-emitting diodes (LED) are the fastest growing technology in the lighting industry, and why wouldn’t or shouldn’t they be.
- LEDs save time, money and power
- Uses 75% less energy than a 65-watt incandescent lamp
- Lasts 5x longer than fluorescents
- Lasts 50x longer than incandescents
- Reduced maintenance and service costs