Click on a picture below to view bulbs within a specific CRI.
Low
High
CRI is a unit of measure that defines how well colors are
rendered by different illumination conditions in comparison to a standard (i.e.
a thermal radiator or daylight). CRI is calculated on a scale from 1-100 where
a CRI of 100 would represent that all color samples illuminated by a light
source in question, would appear to have the same color as those same samples
illuminated by a reference source. To put it another way, low CRI causes colors
to appear washed out and perhaps even take on a different hue, and high CRI
makes all colors look natural and vibrant.
This
four-foot T12 fluorescent tube (F40DSGN50) has
a CRI of 90, which is excellent. While this
four-foot T12 fluorescent tube (F40CW/SS/ECO) has
a CRI of just 62.