- What is an LED?
A light emitting diode (LED) is a semiconductor device that emits visible light when electrical current passes through it, it is a special kind of diode.
- What color of light can LED emit?
Most LEDs are monochromatic. Light color is associated with the light wavelength. LEDs made with different semiconductor materials emit lights in different wavelengths. LED light wavelengths range from 400 nanometers (blue) to 800 nanometers (red). The colors of popularly available LEDs in the market are red, orange, amber, yellow, green, blue and white.
- What are the advantages of LEDs compared with conventional incandescent lights?
There are several obvious advantages LEDs have over traditional incandescent light bulbs, they are as follows: Low power consumption - energy saving, long lasting, cold lighting, ruggedness, small size and weight, fast switch times, simple to use.