Rectangular body with rounded edges, comprising a watertight polycarbonate housing and diffuser. Contains a single fluorescent lamp that illuminates if the power supply fails. An internal microprocessor checks the status of the device and periodically performs functionality and autonomy tests and reports the status. If the luminaire is connected to a TMA Module, the details of its status are sent through this module to a control computer, which can monitor the status of the entire emergency lighting system.