Designing Lighting for Changing Bodies and Minds
Buildings are often designed around a fixed idea of the “average” user, but in reality, people are anything but fixed.
Our vision evolves with age, and our cognitive needs shift throughout the day. Hormones, health, neurodiversity, stress, screen use and circadian rhythms all influence how we experience light. Recognising these differences can help buildings better serve the people who use them.
With increasing emphasis on people-first environments, lighting is no longer viewed solely as a technical requirement but as a dynamic design tool that can respond to human needs.
Designing lighting – whether for workplaces, or education settings – means recognising that bodies and minds change, and that our built environments must adapt alongside them.
We Don’t Experience Light the Same Way Forever
A simple reality sits at the heart of human-centred lighting design: a 20-year-old and a 60-year-old do not perceive light in the same way.
As we age, our eyes typically need more light to see clearly and comfortably. A 40-year-old may require around twice as much light as a 20-year-old for comparable visual clarity, while a 60-year-old may need four times as much.
Yet many lighting standards are effectively based around the visual needs of a typical 40-year-old. In reality, building occupants span a far wider age range, each with different visual requirements.
Colours may appear different, contrast becomes harder to detect, and glare often feels more distracting with age. Light that feels bright and comfortable to one person may feel harsh or insufficient to another.
When lighting is designed only to meet minimum standards, these differences can leave some people comfortable while others struggle to see or experience fatigue. Designing for an “average” user, therefore, risks excluding many of the people who actually occupy a space.
Changing Bodies: The Biological Dimension
Human physiology shapes how we experience light throughout our lives. Lighting affects not only how we see, but how we feel, think and function.
Ageing eyes typically require higher light levels and better contrast for comfortable visibility, whilst careful glare control becomes increasingly important to prevent visual fatigue.
Hormonal changes can also influence light sensitivity and comfort. For example, people experiencing menopause may report increased sensitivity to light, fatigue and sleep disruption – all of which can affect well-being and productivity in the workplace.
Circadian rhythms add another dimension. Modern lifestyles often involve long hours indoors, extended screen exposure and reduced access to natural daylight. Lighting that supports the body’s natural rhythms can help regulate alertness, mood and sleep patterns.
This is where Human Centric Lighting (HCL) plays an important role. By considering the biological effects of light – including melanopic stimulation and the changing patterns of natural daylight – designers can create lighting environments that support both visual and physiological well-being.
In this context, lighting becomes more than illumination; it becomes a subtle regulator of comfort, well-being, and daily rhythm.
Changing Minds: Cognitive and Psychological Needs
Lighting also plays an important role in cognitive and emotional experience.
In workplaces and educational environments, lighting can influence concentration, stress levels and mental fatigue. The widespread use of digital screens means people frequently shift their focus between monitors, paper and the surrounding environment – placing new demands on lighting balance and contrast.
Growing awareness of neurodiversity is also changing how designers approach sensory environments. Individuals with conditions such as autism, ADHD or dyslexia may experience sensory input differently, meaning lighting that feels neutral to one person may feel overwhelming to another.
Recent research found that some users prefer lower light levels, reduced glare or warmer colour temperatures to minimise sensory stress. Flicker, reflections and uneven brightness can also contribute to discomfort or distraction.
This does not mean there is a single “correct” lighting condition. Instead, it highlights the importance of flexibility and user choice.
Designing for Variability, Not Uniformity
If people experience light differently – and if those experiences evolve – then lighting design should not focus on uniformity, but adaptability.
Traditional lighting schemes often aimed for consistency: evenly distributed illuminance, fixed colour temperatures and static lighting conditions throughout the day. Today, human-centred design increasingly recognises that spaces benefit from a custom lighting system.
Lighting systems can support this through:
- Adjustability – allowing brightness and colour temperature to change
- Zoning – enabling different areas to support different activities
- Personal control – allowing individuals to tailor lighting to their needs
- Temporal change – aligning lighting conditions with natural daylight rhythms
- Visual hierarchy – guiding movement and attention through contrast
Systems such as Organic Response enable these principles in practice. By integrating sensors directly into each luminaire, Organic Response enables lighting to continuously respond to occupancy and daylight levels throughout a space, with each fitting communicating with the ones around it, enabling localised dimming, adaptive zoning, and responsive lighting scenes without the need for complex central programming.
This distributed intelligence means lighting can automatically adjust to changing conditions, support daylight-led rhythms and provide the flexibility needed for different activities and user preferences. In essence, it shifts lighting from something static and uniform to something that quietly adapts to the people and spaces it serves.
The Architectural Responsibility
Human-centric lighting works best when integrated into the architectural concept from the earliest stages of design. Daylight strategy, interior finishes, ceiling heights, surface reflectance and spatial planning all influence how light is experienced.
Successful projects therefore require collaboration between architects, lighting designers, engineers and clients – including engagement with end users – to ensure lighting supports the wider spatial vision.
This approach is becoming increasingly important as societies age and awareness of diverse user needs grows. Buildings must accommodate a broader range of visual and cognitive experiences than ever before.
Designing for People
Ultimately, the goal of lighting design is not simply to illuminate architecture, but to support the people who inhabit it. As people age, their sensory preferences evolve, lighting that recognises these realities can help create spaces that feel comfortable, supportive and intuitive to use.
By moving beyond the idea of the “average” user and embracing variability, lighting systems can play a vital role in creating environments that reflect the diversity of human experience. And in doing so, lighting becomes one of the most powerful tools available for shaping truly people-centred spaces.
Want to explore how lighting can support changing human needs? Get in touch with us to learn more about how we can help create more comfortable and inclusive environments.
Organic Response
Organic Response enables flexible and scalable lighting control for workplaces and learning environments. The system can be customised for every lighting solution and brings everything together in one place. Already at installation, energy consumption is reduced by 40 percent, and with each option you make, efficiency, lighting comfort and technical possibilities increase further. Regardless of what your project looks like and how you choose to use the lighting control, you can create the best experience for everyone, save energy and reduce costs - in several smart steps.
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