Emergency lighting or emergency lights are lighting devices backed by a battery that are intended to ensure, in the event of a failure of the normal lighting supply, lighting in the premises and accesses to the exits, for a possible evacuation of the public or to illuminate other points that are indicated.[1]​.

Depending on their use, they can be divided into security lighting, intended to guarantee the safety of people who evacuate an area or who have to finish potentially dangerous work before

leave the area, and replacement lighting, emergency lighting that allows the continuity of normal activities.

It is made up of one or more lamps, an internal battery and several electrical components inside and a pilot light, normally red or green, that remains illuminated when the lamp is off, while it goes off when the emergency lighting comes into operation when the supply fails in the normal lighting. Some models of emergency lights are provided with a lamp test switch to test their functionality. The battery capacity is calculated to ensure a certain autonomy of the luminaire, ensuring the operation of the device for a certain time.

The DIALux software can be used as powerful software for planning, calculating and visualizing emergency lighting according to DIN EN 1838.

European emergency lighting regulations.