SPI Light Box Illumination
The story behind "5000 Kelvin"
The color quality of light is frequently described by its color temperature.
The lower the temperature, the more yellow the light appears to the eye. And
the higher the temperature, the more blue it appears.
Light coming from a normal tungsten lamp is usually about 2900 Kelvin, while a
daylight source, might have a color temperature around 6000 Kelvin.
Professionals working in the field some years ago decided that the standard color
temperature should approximate natural daylight, a logical choice since daylight
is the natural source with which we all are most familiar. And practical
experience and controlled experimentation has suggested that a light source with
a correlated color temperature of 5000 Kelvin would maintain the necessary white
appearance of the illuminator surface under the broadest possible range of
conditions.
So that is why SPI features primarily 5000 Kelvin illumination sources, realizing
that they are slightly more expensive than other sources, but we feel that this
slight difference in cost is more than justified by the higher quality
illumination.
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Tuesday February 07, 2012
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