About Trunk Light
The trunk light can be a small light bulb that is mounted on the highest part of the trunk of a car. The primary function is to eliminate mystery from the trunk once the lid is removed. The trunk light will last for years, because it's never used. Like any commonplace light bulb, though, it is at risk of breaking or failing due to age or in some cases due to explosive movement of the vehicle that destroys the filament inside.
What is the purpose?
The trunk light may be a small light bulb mounted on the highest part of the trunk of a car. The principal function is to eliminate the darkness from the trunk once the lid is removed.