Why LED Lighting?
There are several reasons to switch to LED lighting. For starters, they are the most energy efficient lighting solution available, as well as the most affordable over the lifespan of the bulb. In fact, they use only a fraction of the energy that their counterparts use.
Furthermore, LED lighting is the most eco-friendly solution available, and does not contain hazardous materials such as mercury compared to compact fluorescent lighting (CFL), which also have to be properly disposed of.
What are the benefits of LED Lighting?
Cool - An LED bulb radiates very little heat. If it makes contact with sensitive objects such as fabric, it avoids potential fires.
How LEDs Work
LEDs differ from traditional light sources in the way they produce light. In an incandescent lamp, a tungsten filament is heated by electric current until it glows or emits light. In a fluorescent lamp, an electric arc excites mercury atoms, which emit ultraviolet (UV) radiation. After striking the phosphor coating on the inside of glass tubes, the UV radiation is converted and emitted as visible light.
An LED, in contrast, is a semiconductor diode. It consists of a chip of semiconducting material treated to create a structure called a p-n (positive-negative) junction. When connected to a power source, current flows from the p-side or anode to the n-side, or cathode, but not in the reverse direction. Charge-carriers (electrons and electron holes) flow into the junction from electrodes. When an electron meets a hole, it falls into a lower energy level, and releases energy in the form of a photon (light).
The specific wavelength or color emitted by the LED depends on the materials used to make the diode.
Red LEDs are based on aluminum gallium arsenide (AlGaAs). Blue LEDs are made from indium gallium nitride (InGaN) and green from aluminum gallium phosphide (AlGaP). "White" light is created by combining the light from red, green, and blue (RGB) LEDs or by coating a blue LED with yellow phosphor.
LEDs verses Compact Fluorescent Lights
LED lighting provides several advantages in comparison to compact fluorescent lighting. They have lower energy consumption, longer life cycle, and better light distribution.
More Energy Efficient – LEDs use around 10-50% less electricity to deliver the same level of lighting. LEDs also use less heat output, which helps to reduce the HVAC load.
Dimmable – Unlike compact fluorescent lighting, LEDs are dimmable.
More Cost Efficient – Although LED fixtures have a higher initial cost, they provide more cost savings over the lifetime of the bulb. In fact, some bulbs last as high as 50,000 hours. LEDs also have a lower maintenance cost.
No Hazardous Materials- LEDs do not contain mercury or other hazardous materials like compact fluorescent lighting.