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http://zfacts.com/p/421.html
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Choosing a color of light
We see redder light as "warmer" and bluer light as "cooler." But the science goes the other way. Hotter filaments make bluer (cooler light) and cooler filaments make warmer (redder) light.
The color trick:
For a "warm" light fluorescent, pick a cooler temperature rating, 2700K.
For a "cool" light fluorescent, pick a hotter temperature rating, 6100K.
For the same color as a regular light bulb, be sure to pick 2700K.
These are not the temperatures of the fluorescents (which are only about 100°F -- just warm to the touch), they are the temperature of a normal incandescent bulb with the same color. Here's a table of what the temperature's mean in terms of normal bulb labels.
Color temperature:
2700K = warm white (standard bulb)
3500k = soft white
4100k = cool white
5100k = Full spectrum
6100k = daylight
CRI = color rendition index (0 -- 100).
All recommended bulbs are greater than 80, which means they their color does not look odd--just looks like a normal light.
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http://zfacts.com/p/421.html | 01/18/12 07:27 GMT
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