Moving head projector comprising a base, to which base a yoke is rotationally connected, to which yoke a head is rotationally connected, the head having a light source partly inside a reflector that forms a light beam which passes through a light forming arrangement located on at least one rotating disc formed member that is rotated by at least a first motor, and at least one lens through which the light beam passes before leaving the projector. The light forming arrangement is exchangeable via an opening in the head of the projector located radially outward of the at least one rotating disc formed member for providing direct access thereto during operation of the projector, the projector having a cover for closing and exposing said opening, opening of the cover switching the projector from a first mode of operation to a second mode of operation.