The LED was first documented in 1962, but has become popular in recent years for a multitude of reasons. It’s unique construction and relativly low environmental impact make it extremely useful in situations from the domestic to the industrial. LEDs come in a wide range of sizes and colors, so the applications are infinite. Understanding how an LED works can be tricky, but when you abandon the jargon, it can be understood relatively easily. If you’re considering using LEDs for a lighting project, understanding how the bulbs work can help you conceptualize and install whatever it is you’re planning. This guide will introduce the science of LEDs, and explain their many applications and benefits.