Colour Temperature: An Important Specification Figure of LED Products

Dec. 7, 2010 - PRLog -- LED products, an important specification figure is the color temperature, which relates to the LED lighting products shows color characteristic, general lamps had color temperature specifications too. Colour temperature level measurement unit is KelvinScale, namely to K as units.

For lighting building interiors, it is often important to take into account the colour temperature of the lights used. For example, a warmer light is often used in public areas to promote relaxation, while a cooler light is used to enhance concentration in offices.

The CIE color rendering index (CRI) is a method to determine how well a light source's illumination of eight sample patches compares to the illumination provided by a reference source. Cited together, the CRI and CCT give a numerical estimate of what reference (ideal) light source best approximates a particular artificial light, and what the difference is.

The definition of colour temperature:
With absolute temperature K to represent, that means make the standard black body heat, the temperature will increase to certain degree, the colors started scarlet - light kermes - orange - white, blue, they will change in generally.

Different light environment:
Halogen lamp 3000k
Osram lamp 2700k
HPSL 1950-2250k
Candle light 2000k
Metal halide lamp 4000-4600k
Cool color camp light 4000-5000k
High-pressure mercury lamp 3450-3750k
Warm color fluorescent lamps 2500-3000k
Clear sky 8000-8500k
Cloudy sky 6500-7500k
Summer midday sun 5500k
The afternoon sun 4000k

Different color temperature under light color:

1. Low color temperature is in 3300K below, light color slant red to warm feeling; It is sedate atmosphere, warm feeling; When using low colour temperature source illuminate, can make more bright-coloured red.

2. Middle color temperature is at 3000-6000K for middle, people in this tonal below without special obvious visual psychological effect, it is blissful feeling, so it called "neutral" colour temperature. When using color temperature, blue source irradiation with cool and refreshing feeling.

3. High color temperature exceeds 6000K, light color slant blue, giving a person with cool feeling, when using high temperature source, color according to object has a cold feeling.


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