The following list consists of lighting terms that will help you better understand
why Navitar lighting is superior to standard room lighting when it comes to
digital imaging.
Color Rendering Index (CRI)
A rating system that describes the effect of a light source on the color appearance
of objects (compared to a standard reference source of the same color temperature).
A rating of 100 is the highest possible CRI. Typical cool white fluorescent
lamps have a CRI of 62. Lamps with rare-earth phosphors can have a CRI of 80
or higher.
Color Temperature
The color a light source appears to be, ranging from reddish (lower color temperatures)
to bluish (higher color temperatures). Measured in degrees Kelvin (ºK).
Diffused Light
Produces a soft light with soft shadows while illuminating a relatively large
area. Illumination is indistinct rather than obvious, distinct light beams.
Fill Light
Supplementary illumination positioned to reduce or eliminate shadows created
by key light.
Flare
Over saturation of light that appears when too much light is picked-up by a
camera’s lens and reflected off its internal glass elements.
Foot Candle (fc)
A measurement of illumination where one unit is equal to the light of a candle
at a distance of one foot.
Glare
A condition caused by light within the visible field that is brighter than the
level of light to which the eyes are adapted.
Key Light
The principal directional light. Usually positioned off-center and angled towards
the subject.
Three-point Lighting
A basic lighting method in which key light, fill light and back light are all
used to illuminate the subject while providing depth and texture.
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