Light Bulbs Alter True Colors
Summary: Light bulbs can alter the true
colors of your new rose color chaise. A quality light bulb with a high color
rendering index will keep it from looking like a gaudy green. This Kelvin Scale
chart compares different light sources from the warm red orange end to the
higher color temperature blue/violet spectrum.
Related
Articles:
Light Bulb Color Temperature, Color Temperature and Kelvin Scale, Color Temperature,
Light Bulb Comparisons,
Fluorescent Light Bulb
Kelvin and Color Rendition Scales
Kelvin Scale Comparative Values
The following list gives you a feel of where certain light sources are relative to one another on the Kelvin scale.
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- Some Halogen Bulbs
3,000K
- Mid Range Fluorescent Bulbs
3,500K
- Cool Fluorescent Bulb
4,100K
- Some Metal (Mercury)Halide Bulbs
4,500K
- Special Fluorescent Bulbs
5,000-6,300K
- North Blue Sky light in low pollution area, low humidity, ideal weather
conditions, high noon
7,000-8,500K
Color Rendering Index
The color rendering index is an arbitrary scale of 0 to 100. It was developed in the 1930's, before fluorescent lights. True color samples (8) picked by the international lighting community are used to test the manner in which a particular bulb affects the color of the samples. Since the color of the sample is known, the amount that its color changes because of the bulb illumination determines the bulb's scale rating.A 0 rating would be the absolute worst, with a score of 100 being perfect.
Ratings can be all over the scale. For example, certain mercury vapor lamps have a CRI rating of 20! That is why your car looks weird in some parking lots at night. Some fluorescent bulbs have a CRI rating as high as 90.
For comparative shopping, any bulb with a CRI rating of 70 or higher will produce excellent color rendition. Values between 60 and 70 would be considered good. Below 60, and you run the risk of poor color rendition. Be careful!
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