Definition of "droplight"

The frameless droplights are fitted with an improved Beclewat catch, which is easier to operate than earlier designs.

1960 November, “New electric multiple-units for British Railways: Manchester/Liverpool and Crewe”, in Trains Illustrated, page 660

And the old slam doors were very dated - especially with the need to pull down a droplight window, get your arm out of the window, fiddle for the handle, and open it (often with two or three attempts if you are elderly or just not used to these doors).

2019 October 23, Pip Dunn, “The next king of Scotland”, in Rail, page 50