When the sun shows in the sky, it may show as red, orange, and yellow or maybe white which is determined by the position of itself. The changing color of the sun through the course of the day is as result of scattered light from the sky, which tends to spread blue lighting rather than red lighting.
Daylight has a spectrum which is likened to that of a black body with the same color temperature of 6,500k the standard view of D 65 or 5500k, the standard daylight-balanced photographic film.
For the colors based on the blackbody theory, temperature of blue color is higher, while that of red is lower
The correlation of color temperature
The temperature of the light source is the temperature of a black-body radiator which reflects light compared to hue and that of the light source. Color temperature is a feature of the visible light that has an important function in design verlichting, photography, and videography. In a real sense, the temperature of a color is only used for light sources which correspond to the radiation giving out by some black body.
For lighting the interiors of a building, it is often important to take into consideration the temperature of the bright color. For example, a warmer light (of little temperature and color) is commonly used in public areas to create a sense of relaxation, while the cooler light (of higher temperature and color) is used in the office to build a concentration of the staffs.
The color temperature of the electromagnetic radiation in the emission of an ideal black body is the surface temperature in Kelvin, or in mireds or micro-reciprocal kelvin). This gives a standard to which light sources are weighted.
The categories of different lighting based on their temperature
The color temperature is not the actual surface temperature. Many of the light sources such as fluorescent lamp or the light emitting diodes do release light base on the processes but not by thermal radiation, which connotes that the radiation does associate with black body radiation.
- 1700 k- match flames, low-pressure sodium lamps
- 1850 k candles flames, sunrise, and sunset
- 2700-3300 k- incandescent lamps and soft white fluorescent lamps
- 3000 k- warm white fluorescent lamps
- 4100-4150 k- moonlight and cool white fluorescent lamps
- 5000 k- Horizon daylight
- 5500-6000 k- vertical daylight, electronic flash
- 6200 k- xenon short-arc lamp
- 6500 k- daylight, overcast, daylight fluorescent lamps
- 6500- 10500 k- LCD or CRT screen
- 15000-27000 k- bright blue poleward sky