Series of wall- or ceiling-mounting lighting structures with indirect lighting using 24W and 54W T16 fluorescent lamps, intended for the illumination of spaces such as entrance halls, reception areas, corridors, meeting rooms, etc. Aluminium body with white paint finish. 40x40mm square section modules. Distance to wall or ceiling: 16cm. Each structure is composed of pre-assembled and pre-wired sub-units, with a drilling stencil for placing the fixing points. Electrical connection via quick connectors. Electronic control gear. Dust protection cover in polycarbonate. Complies with standard EN60598-1 and other specific standards.