D defs.my
Entry 1 sense Webster, 1913

Footlight

/fo͝ot'-lītˌ/ · Foot·light · IPA /fˈʊtlˌaɪt/
01 n. One of a row of lights in the front of the stage in a theater, etc., and on a level therewith.
  1. 1.
    One of a row of lights in the front of the stage in a theater, etc., and on a level therewith.
Phrases & compounds
Before the footlights — upon the stage; -- hence, in the capacity of an actor.