Section 28.4 - HALL LANTERNSA visible and audible signal shall be provided at each hoistway entrance to indicate which car is answering a call. Lanterns shall comply with the following:
28.4.1 Hall lantern fixtures shall be mounted so that their centerline is at least 72 inches (72" = 1829mm) above the lobby floor. SeeFig. 28a.28.4.2 Audible signals shall sound once for the up direction and twice for the down direction or shall have verbal annunciators that say "up" and "down."28.4.3 Visible signals shall have the following features:a. Visual elements shall be at least 21/2 inches (21/2" = 64mm) in the smallest dimension.b. Signals shall be visible from the vicinity of the hall call button. SeeFig. 28a. In-car lanterns located in cars, visible from the vicinity of hall call buttons, and conforming to the above requirements, shall be acceptable.