To lighten up an area, to trick Mater
In Mater and the Ghostlight, the Radiator Springs townsfolk trick Mater into thinking the Ghostlight is chasing him by stealthfully attaching it to his tow hook. For the majority of the short, Mater is running around Radiator Springs, screaming because the "Ghostlight" is chasing him. At the end, Mater discovers that it's only a lamp.
Mater's Lamp was used by Mater's friends to trick him. As a lantern, it provides light to the car using it.
Mater's Lamp is a black lantern, with a light in the center of it.
- It was released in the 1:55 Scale Diecast line, in a package with Mater.