What is human centric lighting?

    Human Centric Lighting represents a new concept that focuses on designing light that's adapted to human needs by implementing the visual, emotional, and biological effects of light. HCL achieves this by taking artificial light and transforming it to have the same benefits as natural light.

    How does it work?

    Human Centric Lighting aims at modifying the non visual parameters of the light spectrum to create light combinations that can get as close as possible to natural light. By adapting the spectrum of artificial light, we can actually transform artificial light to have the benefits of sunlight, reproduce the cycles of the sun, and therefore accommodate to our circadian rhythms.


    In order to fully grasp the extent of Human Centring Lighting for our health, we need to understand how humans interact with light and how it affects every aspect of our lives.

    What is a Circadian Rhythm?

    The term circadian comes from the Latin circa, meaning "around" (or "approximately"), and diēm, meaning "day".

    A circadian rhythm consists of a set of structures that produce, coordinate, and synchronise the sleep-wake cycles both internally and externally, synchronising our different biological rhythms with the natural light cycles of day and night.

    For a proper regulation of our circadian rhythm, we need the appropriate light properties at specific times during the day, so that we can feel activated in the early morning and relaxed during the evening,

    With conventional artificial light, we expose ourselves to inappropriate light, having the same type of light at all times. This can lead to a disruption of our circadian rhythms, which can have a negative impact on our sleep-wake cycles, meaning difficulty sleeping, feeling energised, and dealing with stress.

    Discover our Kumux Platform

    Do you want to have full control and freedom over your light scenes? Kumux Platform gives you access to our online platform, where you can customise your light parameters and create your own light scenes.


    To avoid disrupting our circadian rhythms, it is recommended to have indoor spaces where artificial lighting reproduces natural light, taking into special account light non-visual parameters, such as light spectrum, colorimetric values, and energy efficiency.

    When it comes light non-visual parameters, there is plenty of scientific evidence such as M/P ratio, circadian stimulus, and MEDI that are key to create a proper circadian system synchronisation, and therefore, help regulate our internal biological rhythms. Colorimetric values TM30-20 are also a key factor in choosing the right light for a specific time of the day, since they help to create relaxing spaces (warm light) that prepare us to go to sleep, or active spaces (cool light) that boost productivity and concentration.

    Discover Kumux HCL Pro

    In order to produce the best and most accurate artificial HCL, we need to consider not only the light color that we perceive, but also the composition of that light, the light spectra and the amount of blue light it contains.

    Our software takes into account visual and non-visual parameters of light to increase the potential of your smart light bulbs and help them obtain natural light properties.