Bright object noted in sky, abruptly disappeared without a trace.While flying at an altitude of about 4000' a bright light was noted bearing about 170 degrees and 20 degrees above the horizion from our position over Lake Placid, FL. The light appeared to be the color of sodium vapor street lights (orange). I pointed it out to my passenger and in obout 20-30 seconds it abruptly disappeard completely. It was not possible to determine the movement or distance from our position it could be.A simular experience was noted by my neighbor the next night except there were four lighs and appeared to move in two pairs. These also abruptly disappeared but left random sparkling in the area.