Color reproduction (RA value)

The color reproduction index (RA or CRI) describes the color reproduction, therefore providing information about the light quality. In other words, it indicates how realistic the color reproduction of an illuminated object will be underneath the requisite light source. The highest color reproduction value is RA = 100 (sunlight). A light source of this value allows all colors within our environment to appear at their most natural. The lower the RA value, the lower the quality of the color reproduction of the illuminated object will be.

The European Union (EU) stipulates that the color reproduction index of LEDs must be at least 80 RA. Technically, it is now possible to produce LEDs with RA values of greater than 90. However, these consume more energy. Therefore, an RA value of 80 is permissible for normal usage such as workplace lighting. In the case of jobs that require an accurate level of color perception (hairdressers, printing shops), light sources with RA values of at least 90 are recommended.

Color temperature

Color temperature describes the color of a light source. The color temperature is given in kelvins, but appears to be warmer the lower the value is. Neutral white light has a color temperature of 3300 to 5300 K. If the color temperature is below 3300 K then the light is warmer, while it is colder if the temperature is above 5300 K. The color temperature provides information about the light color, but not the color’s quality or reproduction. As a general rule of thumb: The higher the kelvin value, the cooler and whiter the light. Conversely, the lower the kelvin value, the warmer the light.

Cold white light and daylight white is cool, sober and exudes a bluish hue. This has a stimulating effect and boosts the concentration, making it perfect for work (office).

Neutral white light is neutral and sober, and has little influence on a room’s ambiance. Therefore, this color temperature is strongly recommended for use in the kitchen or bathroom.

Warm white light has a pleasant, comfortable and dimming effect. It has a yellowish appearance (similar to a sunset) and is therefore perfect for evenings spent relaxing in the living room.