Two way means either, or and having two lamps outside an office with enter and wait with a switch to select which bulb shows is still a two way lighting circuit. If you were to increase the number of bulbs to three, enter, wait and vacant wired to a three position switch that would be three way wiring. However having two, three, four or more switches to control the same set of lights is still two way wiring as it uses two way switches either up or down there is no third position.
I bought an outside two way switch which had instructions on how to control two lights rather than what we normally consider as two way being one light and two switches. I only say this as internet search for three way lighting may bring up the wrong thing. I am not picking you up on wrong wording.
You say old school
this was how I was taught at school, yes it works, but with AC current we do not really want to wire in singles and go around the room as shown in the old school diagram. We want to use standard cables. There were some good diagrams in the old forum but they seem to have vanished with the upgrade. The ones which were there showed better how it actually connects than mine. Maybe they can be re-installed?
