This is the interior of a smart home, with a strong emphasis on the balance between circadian rhythm and the colour temperature of the light from artificial lighting. The lighting profiles use two LED strips, one cold and one warm, to mix the right colour temperature depending on the time of day. The other luminaires are equipped with Philips Hue technology, which also adjusts the light temperature. Warm white in the morning, but getting colder towards midday, cold white at midday, and warmer as you get further into the evening. 

In nature, the coldest natural light (between 4000K and 10000K) occurs when the sun is highest in the sky, i.e. at noon, and people are most alert at that time. So cold light is used to encourage alertness. The warmest light (between 2700K and 3500K) is when the sun rises or sets, when going to bed or getting up. Adjusting artificial lighting to the colour temperature of the sun produces artificial lighting that is less disruptive to natural circadian rhythms and is more conducive to human health, good sleep and productive work.