trouble light meaning

WTrouble light

A trouble light, also known as a rough service light, drop light, or inspection lamp, is a special lamp used to illuminate obscure places and able to handle moderate abuse.
Trouble lights are usually powered by AC wall current, but some are powered by a 12-volt source, such as a car battery.
Trouble lights are intended to be used with "rough service bulbs", a form of incandescent light bulbs which are designed with as many as five support wires holding the filament to allow it to withstand heavy vibrations or movement.

Definition of trouble light in English Dictionary

NounPLtrouble lights
1. A heavy-duty light used for local lighting by maintenance personnel, usually having a long cord, cage or shroud, and hook.

Source: Wiktionary