fig1 the three color lamps in the three r g and b groups are set as one unit to be fixed in each floodlight f equipped at the top of each lighting pole and the color lamps in each unit are matched to each direction d and three units a b c are arranged so as to give relatively wide illuminated region in the conventional cases beautiful and balanced colored shadows of the object can be obtained in a region for the direction d however the object is illuminated by the color lamps in each unit by superposing the lights in the region i between the regions for adjacent directions d d accordingly as illustrated by the case of lighting an object at the point a in the region i of fig1 the lights of the color lamps in the g groups are given from three directions separated from each other as shown by the dotted lines and the lights of the color lamps in the r group and the lights of the color lamps in the b group are respectively given from three directions whereby three times as many colored shadows appear as a phenomenon of shadows doubling in the phenomenon the contours of shadows are blurred without forming clear contours and the beauty of the shadows is lost accordingly in.