Techlumen LED Lighting

Tunable White

Variable color temperature lighting for human-centric illumination

2700K Warm 4000K Neutral 6500K Cool

Tunable CCT technology enables TECHLUMEN LED luminaires to adjust the color temperature of white light to any value between 2700K (warm white) and 6500K (cool white), simulating the natural variations of sunlight throughout the day.

Meeting room with Tunable White lighting - 6500K, 4000K, 2700K
The same room at three different color temperatures: 6500K (cool), 4000K (neutral), 2700K (warm)
01

Human Centric Lighting

Workers often spend many hours in their workplace with limited access to natural light. Artificial lighting is the most significant factor for visual comfort and simultaneously serves as the primary source of information for synchronizing the circadian rhythm.

Human Centric Lighting (HCL) recognizes that lighting affects not only vision but also human physiology, emotional state, and productivity.

What is the circadian rhythm?
The circadian rhythm is the body’s internal 24-hour “clock” that regulates the sleep-wake cycle, consisting approximately of 8 hours of sleep and 16 hours of wakefulness. Its disruption is linked to fatigue, reduced concentration, and health problems.
02

The Science Behind Light

The properties of natural light — intensity and color temperature — serve as signals for the body to regulate the secretion of critical hormones:

Cortisol
The “stress hormone” that wakes us up in the morning and keeps us alert. It is stimulated by cool, intense light.
Serotonin
The “happiness hormone” that regulates mood, appetite, and memory. It is enhanced by exposure to bright light.
Melatonin
The “sleep hormone” that prepares the body for rest. It is produced when light is warm and low intensity.
“The healthy function of the sleep-wake cycle is essential for preventing physical and psychological health problems, such as chronic fatigue and depression.”
03

Color Temperatures

2700K
Warm White
Relaxing, cozy, ideal for rest areas
3000K
Warm White
Welcoming, for hospitality and residential spaces
4000K
Neutral White
Balanced, for offices and commercial spaces
5000K
Daylight
Energizing, for high-concentration workspaces
6500K
Cool White
Stimulating, for laboratories and precision areas
04

Daily Lighting Schedule

The Tunable CCT solution simulates natural daylight, automatically adjusting color temperature based on time of day:

06:00 – 09:00
3000K → 4000K Wake up
09:00 – 12:00
5000K – 6500K Peak alertness
12:00 – 15:00
4500K – 5000K Productivity
15:00 – 18:00
4000K – 4500K Steady performance
18:00 – 22:00
2700K – 3000K Relaxation
Why does it matter?
With the right color temperature and appropriate lighting intensity, it is possible to feel comfortable despite artificial lighting, whether you’re working in an office, studying at university, or recovering in a hospital.
05

Applications

Office space with Tunable White lighting - 2700K, 4000K, 6500K
Office space at three temperatures: warm (2700K), neutral (4000K), cool (6500K)
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Healthcare
Improved patient wellbeing and accelerated recovery. Circadian rhythm support in hospitals and long-term care facilities.
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Offices & Business
Increased employee concentration and productivity. Reduced fatigue and improved overall wellbeing in the workplace.
🎓
Education
Students benefit as they can focus for longer periods. Improved performance in classrooms and libraries.
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Retail
Present merchandise in the most appropriate way. Dynamic color temperature adjustment based on product or time of day.
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Hospitality
Create the right atmosphere for every moment — energetic in the morning, relaxing in the evening. Personalized guest experience.
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Residential
Adapt lighting to daily activities and personal preferences. Support healthy sleep for the whole family.
06

Technical Specifications

Color temperature range 2700K – 6500K
Dimming range 15% – 100%
Color stability during dimming Yes
Control protocols DALI DT8, 0-10V, DMX, Wireless
Automatic scheduling Available
Dimming without color shift
The system can be dimmed between 100% and 15% without changing the color temperature — unlike conventional incandescent bulbs that become warmer when dimmed.
07

Tunable White Benefits

Improved Health
Support for the natural circadian rhythm, better sleep, reduced fatigue and stress.
Increased Productivity
Improved concentration, alertness, and performance at work and study.
Flexibility
One luminaire, endless possibilities. Adaptation to every activity and atmosphere.
Energy Savings
Reduced consumption through dimming, without the need to replace luminaires for different applications.

© 2025 TECHLUMEN LED Lighting
Industrial Area of Thessaloniki – Sindos, Greece