Recessed wall lamp for concrete or plasterboard. The light radiates through the methacrylate sheet, thus illuminating the engravings and the edges, and producing a perspective effect. The fixture consists of three parts: a metal housing box, an electrified body with diffuser in white opal polycarbonate and a transparent sheet in methacrylate. The transparent sheet can be selected in order to obtain one of the three different aesthetic and optic effects: perspective, cube on the right side and cube on the left side. As an option, a polished mirrored aluminium reflector may be installed behind the transparent sheet covering the wall. The opal white self-extinguishing polycarbonate diffuser is provided with a frame in brushed stainless steel kept in position by magnets. Upon request the transparent sheet may be customized both in the size and in the graphic (for instance indicating hotel room numbers, signage, etc.). The cube effect sheets may be mounted for having the opposite symmetric effect.