DCHP-2

tri-light trilight DCHP-2 (June 2016)

• n. — rare; often in compounds, e.g. trilight bulb or trilight lamp

  a lightbulb or lamp with three settings of varying brightness (see Image 1).

  Type: 1. Origin — In other locations, the term used to describe this type of lamp or bulb is "three way lamp" or "three way bulb". A trilight lamp uses a trilight bulb. According to comparative database and internet searches, the term is of Canadian origin and is most prevalent in Canada (see Chart 1).
  See also COD-2, s.v. "trilight", which is marked "Cdn".