With the right light color or color temperature, specified in Kelvin (K), you can increase your ability to concentrate. For this purpose, cooler light with a high blue content from approx. 4,000 K is recommended, which has an activating and concentration-promoting effect on us. For relaxed reading in the evening, luminaires with a pleasant warm white color with a maximum of 3,000 K are more suitable. Very good color rendering is also of crucial importance. Full spectrum lamps have a CRI value of 95 or higher, which means that the colors of illuminated surfaces or objects are reproduced almost true to life.