Abstract: Novel and special lighting effects are furnished to an ornamental harness comprising a plurality of decorative transparent or translucid devices each having a light bulb internally arranged thereto, by connecting said light bulbs in parallel with lighting effects generating means which comprise a power supply, wave generating means including a square wave generating circuit and a triangular wave generating circuit connected in parallel to said power supply, ramp generating means connected in series between said power supply and said wave generating means, frequency selecting means coupled to said wave generating means for selecting a desired frequency for the waves generated thereby, waveform selecting means coupled to said wave generating means for selecting between said square wave and said triangular wave generating circuits, and power amplifying means connected between said waveform selecting means and said parallel connected light bulbs for supplying amplified current waves to said light bulbs.