4. Used for different things. LEDs are currently used for various application such as: residential, aerospace industry, broadcasting, entertainment and gaming. It also can be used as a table lamp, night lights or security lights. Since they are so small, they can be used in virtually any application you can think of. They can be combined in bunches for a traditional bulb, used in isolation as a small device light, or strung out in a linear fashion. Just about everything you can think of can be done with LEDs.