Where is solid state lighting used?

In recent 10 years, the technology of electric light source has changed significantly, especially in solid-state lighting. The traditional light bulbs and tubes will gradually be replaced by ultra-high brightness LEDs. Ultra-high brightness led is rapidly spreading, and it is applied to various occasions-outdoor advertisements, buildings, signs and landscape lighting, traffic signals, LCD background light, medical diagnostic instruments, medical and dental applications, navigation instruments, airport and aircraft interior lighting, lighthouses, automobile interior and exterior lighting, and various portable devices-flashlights, bicycle lights, lanterns, work lights, decoration and entertainment lighting.