Frank DuVal
Senior Member
- Occupation
- Electrical Contractor, Electrical Engineer
The lighted toggle switches were a neon light (NE-2 typically) and resistor in series with the switch contacts. When the switch was open, room light off, the little neon bulb was lit, so you could find the switch. Turn on the switch, room light is on, no need for the "night light" function to be on. No neutral needed, no fancy micro electronics were harmed in the process.