Jargon: Lighting Terms

accent light
Any single light that high-lights one single subject. The light can be a back-light, key-light or fill-light.

available light
Amount of illumination present in an environment: natural light, artificial light or a combination of the two.

barndoors
Accessories for video lights; adjustable folding flaps that control light distribution.

best boy
Usually known as the assistant to the key grip or the assistant chief lighting technician.

bobbinet
A black mesh substance, similar to garden shading, to use for darkening windows or as grip scrims.

C-stand
An all-purpose height-adjustable stand similar to a tripod with an arm for attaching flags, scrims and cookies.

celo
Plastic-coated wire mesh cookie.

cookie (cucalorus)
Lighting accessory consisting of random cutout shapes that cast patterned shadows when light passes through. Used to imitate shadows of natural lighting.

diffuser
Gauzy or translucent material (or a device, such as a scrim) that alters the quality of light passing through it to produce less intense, flatter lighting with softer, less noticeable shadows.

dingle
A device that supplies a shadowed pattern, usually a tree branch, to suggest a tree-shadowed area on a backdrop, floor or wall.

flare
Bright flashes evident in video. Caused by excessive light beaming into a camera's lens and reflecting off its internal glass elements.

floodlight
Radiates a diffused, scattered blanket of light with soft, indistinct shadows. Best used to spread illumination on broad areas, whereas spotlights are aimed to focus on individual subjects.

foot-candle
A unit of illumination equal to the light emitted by a candle at the distance of one foot. One foot-candle equals 10.764 lux. (See lux.)

gaffer
The lighting technician in charge of the electrical department of a production.

gel
Colored material placed in front of a light source to alter its hue. Useful for special effects and correcting mismatches in lighting, as in scenes lit by both daylight and artificial light.

J-Lar
Used for splicing gels (called jels outside the U.S.). Usually transparent.

kiss
A gentle brushing of light on a subject or subjects.

opacity
The quantity of surface light spill compared to all of the light in use.

reflected
light That which bounces off the illuminated subject. Light redirected by a reflector. (See incident light.)

reflector
Lighting accessory helpful for bouncing light onto a subject. Often made of lightweight reflective material.

sider
A flag used to cut light. Is also referred to as a cutter.