Luminaire, especially for an explosive environment

A luminaire, especially for an explosive environment, comprising an enclosed housing (1) in which a light source (2) is arranged with a power supply and electronic circuitry (3), and the housing (1) is fitted with a bushing (4) for cables, wherein the housing (1) is divided with a partition (5) into a light source (2) chamber (6), and into an electronic circuitry (3) chamber (7) wherein in the partition (5) between the chambers (6, 7), a grommet (8) for cables is arranged as well as a pressure equalizer (9) Ex d, and the electronic circuitry (3) chamber (7) is fitted with a bushing (4) for cables, and is interconnected with the external environment with a pressure equalizer (10) Ex e, wherein the pressure equalizer (9) Ex d comprises a hollow body (14) with a covering lid (15) and a sealing ring (16) wherein the hollow body (14) is filled with porous metallic filling (17) to ensure air exchange, or pressure equalization, and to extinguish the flame of any possible explosion.