Example: "Many modern cars use LEDs for their brake lights."
LED is short for "Light-Emitting Diode." It is a type of electronic light source that is activated by an electrical current. LEDs are highly energy-efficient and last much longer than traditional light bulbs. They can used for indicator lights, clock displays, street lights, and many other applications. LEDs have also begun to replace traditional bulbs as the backlight source in LCD monitors and TVs.