Arrangement of light emitting diode allowing for uniform illumination of a rectangular area and emergency illumination

摘要

An optical element comprises a body having a radiation exit surface (6) shaped so that the light exiting the body through the radiation exit surface is suitable for uniformly illuminating a defined area from a defined distance. Independent claims are also included for: (1) a light emitting diode (LED) arrangement comprising the optical element and LED as a source of the light; and (2) emergency lighting comprising the LED arrangement and a network-independent power supply.