Grip and Lighting Illustrated Online Dictionary for Film and Video Production
I - from Incandescent to Iris
Incandescent (literally "glowing") - is used to describe
standard "household" tungsten light bulb. A tungsten filament
in a vacuum creates a light with a 2800K (give or take) color
temperature (towards the red end of the light spectrum).
Incident - light falling on a subject (not the light reflected
from the subject) as measured with an incident light meter for lighting
evaluation and camera exposure settings.
Insider - a piece of diffusion or gel placed inside a frame,
close to the lens of a light, behind the barndoors (as opposed to an
"outsider" rig, clipping gel or diffusion to the barndoor
Inkie/Inky (aka brand names, Mini-Mole, Pepper, etc.) - a
250-watt or less small fresnel light. The name may come from the phrase "inky-dinky" meaning "small".
Iris - 1. a variable and controllable opening on leko, Source 4
and other ellipsoidal lighting instruments used to shape the beam of
2. the variable aperture behind the camera lens that controls exposure
to the camera imaging device or film.
3. A circular wipe type effect used from silent films to present