What is the negative leg of a led light?

The negative leg of a LED light, also known as the cathode, is the terminal that connects to the negative side of the power supply. It is typically shorter than the positive leg (anode) and is marked with a flat spot on the LED's casing. When connected correctly in a circuit, the negative leg allows current to flow through the LED, enabling it to emit light. Proper orientation is crucial, as connecting the LED in reverse can prevent it from lighting up and may damage the component.