This is an actual working traffic signal. It has been rewired to light the green, yellow and red light when it's plugged in to house current. It also has a "blinker" plugged in so the lights will flash. This can be removed for constant light If desired, it would be a pretty simple matter to install switches to turn on the lights individually..
While it is a full scale light (about 47 inches tall), it's surprisingly light at about 35 pounds. You can hang it from a ceiling or garage. Most of it is aluminum, with some plastic an other materials inside.