Light emitting diode, or LED backlight, is the most popular backlight used for small and medium LCDs. It consists of surface mount LEDs which are situated in series along the bottom of a shallow plastic tray or the edges of the display.
1. Low cost. 2. Long lifetime- 50,000 hrs. 3. Immunity to vibration. 4. Comes in variety of colors: yellow-green, green, red, blue.