CARLING TECHNOLOGIESToggle Switch,DPDT, ON-OFF-ON (This switch is not momentary). LT-Series toggle switch. AC rated illuminated toggle switches. These lighted toggle switches contain neoprene bushing seals for dust and moisture protection. A variety of maintained and momentary single or double throw circuits, terminations, lamp voltages, and color sequences are available. LT-Series switches fit the industry standard .500 diameter mounting hole.