The motive for the total design was originated from prism, which refracts and reflects spectrums of various lights. - The poles are in the form of triangular poles, escaping from the form of existing round poles and thus presentation of various views is available depending on angles. The head parts also took over the forms of smooth triangular poles so that lights are reflected at the prism when they penetrate them. Also, corners of the triangular poles are internally designed so that orange-color LEDs, operating by sensors according to changes in the intensity of illumination of sunlight, can be installed.