Lighting
and the right spectral quality tells the body it is time to be awake and engaged. Evening light of lower intensity and warmer tone begins the descent toward rest. The body listens to these signals, whether we are conscious of them or not. In older adults, this system weakens.
The circadian clock becomes less robust. The signal needs to be stronger and more consistent to have the same effect. And yet most care environments deliver a signal that is not only weaker than what a younger body receives, but also uniform, static, and therefore almost entirely uninformative. I want to be honest about the limits of the
evidence, because I think precision here is more useful than certainty. The research on dynamic lighting and circadian rhythm restoration in advanced dementia is active and promising, but not yet conclusive. What is not contested is the underlying biology, and what the evidence clearly supports: that separating daytime light from evening light – brighter and cooler during the day, lower and warmer as evening arrives – improves sleep quality, reduces night time disruption, and supports mood and daytime engagement. This does not require sophisticated or expensive systems. It requires intention.
The problem is not brightness. It is stasis When lighting in care settings is discussed, the conversation often begins with lux levels. Is it bright enough? Is it compliant? Those questions matter. But that’s not where the real problem lies. The deeper problem is that most care home lighting is static. The same sources are active from morning to night. The same intensity is maintained. The same tone continues regardless of what the body is preparing to do. The environment is set at a fixed condition, usually a midday compromise, designed to do everything adequately and
How light behaves within most care environments is ignored. And people who live in them carry the cost
nothing well, and it remains there. A space that is lit identically at eight in the
morning and nine in the evening is sending the same message at both times. The day is still happening. For a person whose nervous system is already struggling to maintain a robust circadian rhythm, that message is not neutral. It is an active impediment. The environment is not supporting the transition from day to rest. It is making it harder. In a standard residential setting, this produces an uncomfortable evening. In a care setting, it produces a disrupted night, a difficult morning, a reduced capacity to engage with the day ahead, and over time, a measurable decline in the quality of life being lived there.
Four principles for considered care lighting What follows is not a technical specification, and it does not come from deep operational experience of care settings. It comes from understanding how light behaves and how the body responds to it, applied to a context where that understanding is, I believe, significantly underused. These four principles should inform every lighting decision in a residential care setting, regardless of the scale or budget of the project.
Morning activation The first light a person who lives in a care home encounters should be doing specific work. It needs to be bright enough to register - the ageing eye requires significantly lighter illumination than we might assume, with a sixty-year-old needing three times the illumination of a twenty-year-old to
complete the same visual task comfortably. It should be directional rather than flat, arriving from the side or at a low angle to create structure and orientation. And it should be cooler in temperature than the evening light, supporting the body’s natural alertness cycle. A bathroom lit correctly in the morning
is not simply a safety consideration. It is the first moment of dignity in the day. A face seen clearly, a task completed without strain, a beginning that feels oriented rather than effortful. That is not a small thing. Avoid harsh overhead lighting and instead frame the mirror with wall lights on either side to create a warmer, more considered atmosphere. The Claremont wall lights, from lighting and hardware brand Corston, strike an effortless balance between form and function, sitting just as comfortably in traditional settings as they do in sleek, contemporary bathrooms.
Daytime sufficiency with contrast Through the middle of the day in communal spaces, dining areas and corridors, the priority is adequate light for task and mobility. Not the flat institutional brightness most care settings default to, but light that creates contrast and visual hierarchy. Contrast supports the legibility of edges, transitions, and surfaces for residents whose contrast sensitivity has diminished with age. It also gives the eye somewhere to settle, which reduces cognitive fatigue across the day. Glare deserves attention. Polished floors,
high-gloss surfaces, and large reflective areas that present well in photography create real visual discomfort for elderly people,
June 2026
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