Emergency exit lighting fixture. Housing and end caps made of powder-coated steel sheet. End caps without visible screws, featuring a permanently shape-retaining silicone foam seal. Rectangular diffuser made of non-yellowing plastic (PMMA) in opal. Specially coordinated 2-component optical system for homogeneous and soft illumination of the entire light-emitting surface. Suitable for ceiling and wall mounting. Integrated control gear. Standalone battery system with automatic self-test. Fixture with limited surface temperature according to DIN EN 60598-2-24 for use in environments where the accumulation of non-conductive dust on the fixture can be expected.