LED (Light Emitting Diode) is a semiconductor device that emits visible light when an electric current passes through it. LED has been popular for some years as indicator lights. More than you probably aware, this little light is everywhere in your every day life: there is the red light of your digital clock at night, the green light from your cell phone display, … LED is all around us. Soon it will be commonly used as an actual light source. It has benefits of low-power consumption, high intensity, high reliability, beautiful colors, shock and vibration resistance, long life, etc.
LED has a broad application. For outdoor it can be for declaration of roads, bridge, plazas, parks, buildings, etc. For indoor it can be for entertainment spots, stages, advertisements such as signboards and even for illuminating purposes.