a powerful arc lamp frequently used in film production to imitate the light from the sun; also (and in earliest use) more fully sun arc lamp.

Cinematography. A powerful lamp with a parabolic reflector, used in film production; = sunlamp n. (b) at sun, n.1 compounds 5a. Now historical.

A very bright floodlight used in photography and cinematography.

concrete. Film and Television. (See quots.)

(also with capital initials) a portable incandescent lamp.