An instrument for photodynamic therapy applies treatment light from a dye laser, white light, and ultraviolet fluorescence excitation light from an LED onto a lesion and surrounding areas in a time-multiplexed manner. The electrical connector includes an insulative housing, a number of contacts retained in the insulative housing, a metal shield covering the insulative housing, an insulative cover assembling outside of the metal shield, and a waterproof block interposed between the metal shield and the insulative cover along a vertical direction. Both the shank and the cutting-head coupling portion extend over a peripheral coupling angle \u03c6 of more than 180\xb0. 263 standard, the motion vector prediction is performed with continuity and correlation among the motion vectors, so that two-way decoding is possible during transmission of blocks with a predetermined packet, resulting in better error resilient characteristics. The toner container is supported by the frame cover. The discharge apparatus is in fluid communication with the wastewater in the tank and includes a discharge path to position to transport filtered wastewater outside of the tank.