Which Wire is Positive on an LED Light? Understanding LED Polarity

Learn how to identify the positive (anode) and negative (cathode) wires on an LED light to ensure correct polarity and proper functioning.

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For a LED light, the longer wire, known as the anode, is the positive side, while the shorter wire, known as the cathode, is the negative side. Ensuring proper polarity is crucial for the LED to function correctly.

FAQs & Answers

  1. How do I know which LED wire is positive? The longer wire of an LED is the positive side, also called the anode.
  2. What happens if I reverse the LED polarity? Reversing LED polarity usually prevents the LED from lighting up and can potentially damage the LED.
  3. Why is the longer wire on an LED positive? The longer wire represents the anode (positive side) to help users easily identify correct polarity when installing.

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