31424518[lamps by method of illumination]PT2026-03-30 21:00:38BT31394615lampsPTNT31447045grease lampsPTNT31447050oil lampsPTNT31447054lard lampsPTNT31447071camphene lampsPTNT31447080kerosene lampsPTNT31447084gas lampsPTNT31447091burning fluid lampsPTNT31447098acetylene lampsPTNT31447102candle lampsPTNT31447106spirit lampsPTNT31447110limelightsPTNT31447114incandescent lampsPTNT31447117gasoline lampsPTNT31447121electric lampsPTNT31447126lava lampsPTNT31447130solid-state lampsPT