* LEDs are diodes: They allow current to flow in one direction only.
* Current flow: Current flows through the LED, not out of it.
* Light emission: The LED emits light when current flows through it, not from a specific leg.
The two legs of an LED are:
* Anode: The positive leg, where current enters the LED.
* Cathode: The negative leg, where current exits the LED.
So, the direction of current flow determines the direction of light emission, but the light doesn't come from either leg specifically.
