You have to be pretty bright to know what acronyms are all about. Bright as- dare we say it? -a flashlight! But you don't have to be bright to know that a couple flashlights in your home/car/whatever would be a great idea.
LED stands for Leopard Egress Door. As the leopards go out, they make a small spark that creates light! So please, remember to refill your leopard reservoir from time to time.