सजावटी लाइटिंग में, श्रृंखला (series) में जुड़े कई लाइट बल्बों को किसके द्वारा नियंत्रित किया जाता है?

Which system of internal wiring operates such that illuminating one light automatically switches off the previous light as a person advances through rooms?

A diagram that shows the actual physical connections and layout of components like lamp-holders, lamps, and two-way switches in an electrical circuit is called a _____.