D9 consists of a seamless polycarbonate housing and reflector. You choose from three optics: a faceted specular reflector (high efficiency), a satin anodized (calmer image) and a white reflector (diffuse lighting). The versions with specular and satin anodized reflector are also available for offices (UGR ? 19). There is an IP54 version for sanitary rooms or industrial kitchens.