Tunable White: why smart control of white light makes all the difference

From warm to cool: why colour temperature matters

The colour temperature of daylight changes continuously. In the morning and evening, it has a warm, orange-like hue. During the day, especially around noon, the light is cooler and bluer. Tunable White allows us to mimic this natural evolution indoors using artificial light. In doing so, we create an environment that supports our biological rhythm, resulting in numerous benefits:

• better alertness and concentration during the day
• reduced fatigue
• improved sleep quality at night
• overall higher productivity

In fact, studies show that people working under dynamically tuned lighting, specifically Tunable White that follows the natural daylight rhythm, perform much better on tasks requiring concentration than under standard artificial lighting (like static white or poorly matched colour temperatures). The same study also showed an important increase in alertness. Employees stay more active, sharper, and less tired during the day, which directly translates into better performance, greater safety, and improved comfort.

Thanks to these measurable benefits, HCL (Human Centric Lighting) control via Tunable White is a valuable tool for environments where wellbeing and productivity are key.

The power of smart timing and tuning

The effectiveness of Tunable White, however, heavily depends on how it is applied. A common concern is that employees walk out on dark winter evenings from a “warm-lit” space into the cool blue outdoor light, which may feel unnatural. But the goal is precisely to create a more pleasant, summer-like atmosphere indoors during dark winter months.

That’s why it’s crucial for systems not to drop to their minimum temperature too early. In a smart setup, for example, the lighting doesn’t shift to 2500K (the warmest setting) until around 7 PM, allowing workspaces to still have a relatively neutral or warm tone at 5 PM, adjusted to both the moment and the season. This prevents abrupt contrasts between indoor and outdoor lighting.

The TELETASK approach: smart, flexible, and natural

TELETASK integrates Tunable White fully into its home automation solutions, focusing on both technical flexibility and biological optimisation in work and school/training environments:

Dynamic daylight simulation

The lighting automatically adjusts to stimulate the evolved hormones in the human body. This subtly supports the biological rhythm while enhancing comfort and productivity.
In winter, warmer light will compensate for the lack of natural daylight, creating a more pleasant, summer-like indoor atmosphere that promotes energy and wellbeing.

Smart automation without loss of control

Thanks to configurable end times, you can prevent lighting from becoming too warm or too cool too early in the day. This keeps light transitions natural and comfortable. Still, users can always make manual adjustments via a button or app, although concerning HCL this is not recommended.
Additionally, if HCL doesn’t need to be obtained, with Timed Local Moods, you can set tailored lighting curves for specific rooms that create the right atmosphere and biological effect without sacrificing brightness comfort.
This combines automatic operation with user-friendly flexibility.

Full integration with climate control, shading, and occupancy sensors

The power of the TELETASK system lies in its integration. Tunable White works seamlessly with other smart building features such as shading, ventilation, heating/cooling, and occupancy sensors. For example, intense sunlight can be automatically offset with smart shading and adjusted indoor lighting, while unoccupied spaces do not need to be needlessly lit.

This holistic approach enhances both energy efficiency and comfort.