A lighting apparatus (102) for hazardous environments, comprising at least one substantially point-like source of light (4), and a housing structure for said at least one substantially point-like source of light, defining at least a triple barrier protective encapsulation (1, 3, 7) to seal and insulate said at least one source of light from the environment, wherein said triple barrier protective encapsulation is at least partially optically transmissive to enable light propagation from said at least one source of light to the environment at predefined wavelengths.