The Gay family begins working on their display in late September. They use wire fencing and wooden planks to build reindeers, rainbows, and other fun shapes to decorate with lights.
In their earliest displays, the family used strings of incandescent lights. Each of these bulbs contains a piece of wire called a filament that glows when it’s heated by electricity (see Comparing Lights, below). Wires connect the bulbs to an electricity source like an outlet, creating an electric circuit.
But incandescent lights waste a lot of energy as heat. The bulbs can reach temperatures of 168˚C (334˚F)! That’s why in 2006, the Gay family began using light-emitting diode (LED) bulbs. These bulbs light up when electricity flows through devices called diodes. Diodes don’t need to heat up to create light, so they use less electricity.
It’s important to control the amount of electricity flowing through the display. If there’s too much, the wires can overheat and catch fire. That’s why the Gays use two circuit breakers. If these devices detect too much electricity, they break the circuit, turning off the lights.