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www.westinghouselighting.comWhat is a Good CRI?
The color rendering index (CRI) is measured as a number between 0 and 100. At zero (0), all colors look the same.
A CRI of 100 shows the true colors of the object. Incandescent and halogen light sources have a CRI of 100.
Typically, light sources with a CRI of 80 to 90 are regarded as good and those with a CRI of 90+ are excellent!
The general rule is: the higher the CRI, the better the color rendering capacity.
This chart depicts differing CRIs, with each image having the same warm color temperature (2700K).
UNDERSTAND LIGHT
Lamp size is determined by the maximum diameter
expressed in eighths of an inch (1/8").
For example:
An A19 lamp is 19-eighths of an inch or 19/8" in
diameter. To determine a lamp size, use the full size scale shown
(calibrated in eighths). Place one edge of the lamp to be identified
on the top edge of the scale and measure the approximate
diameter by reading the scale at the opposite edge of the lamp.
Sizes of the more popular lamp types
are indicated on the scale.
LAMP SIZE REFERENCE
Lamp Size
(Shown in actual size)
CRI