Light Lamps for Seniors: New Study Shows That When You Switch Them On Matters Most

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What the Study Did

Researchers from the University of Surrey in the UK led the work, part of a European project called ENLIGHTENme. They recruited 202 people aged 63 to 92 who live independently in Amsterdam, Bologna (Italy) and Tartu (Estonia). The results appeared in September 2026 in the Journal of Pineal Research.

All participants first wore a wrist activity tracker and a small light sensor for two weeks. Then 98 of them received a light therapy lamp for their most-used room, while 93 carried on as usual. After twelve weeks, everyone was measured again.

The lamp group was asked to switch the lamp on within an hour of waking, keep it on for at least two hours, and turn it off at least four hours before bedtime.

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The Key Finding: Timing, Not Ownership

When researchers compared everyone who got a lamp with everyone who didn't, they found no overall difference. Only 52 of the 98 lamp recipients reported using it daily.

The picture changed when the researchers looked at when people used the lamp. Those who switched it on before about 10:30 a.m. showed steadier, less fragmented daily activity than those who started later. Turning the lamp off earlier in the evening, before about 5:45 p.m., was linked to more consolidated rest patterns as well.

The lead researcher described light as a simple, drug-free and potentially low-cost way to support healthy ageing. Still, the study shows that a lamp only helps if people actually use it at the right time.

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Why Older Eyes Need More Light

Daylight sets the body's internal clock (the "circadian rhythm"), which tells us when to feel alert and when to feel sleepy. Light-sensitive cells in the eye send these signals to the brain.

With age, the eye lets in less light. The lens clouds slightly and the pupil gets smaller, so less of the blue-rich light that the body clock relies on arrives at the retina. Add a life spent mostly indoors, such as in an apartment, because of reduced mobility, and the "day" signal can become weak even when the sun is shining outside.

The study supports this: even before any lamp was handed out, participants who naturally got more daylight were more active and rated their sleep better. Those with conditions such as high blood pressure, diabetes, obesity or heart disease tended to have lower daily light exposure.

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What Readers Can Do

Natural daylight remains the best source. The study's lamp schedule suggests a simple routine:

• Get light early. Go outside or sit by a bright window soon after waking, ideally before mid-morning.
• Stay consistent. The study's results point to regular use rather than occasional sessions.
• Keep evenings dimmer. Lower the lights in the hours before bed and keep the bedroom dark.

If daylight is hard to get because of illness, limited mobility or dark winters, a light therapy lamp may help. Check that it is UV-filtered, that the manufacturer states its brightness at a specific distance, and that its surface is large enough to sit in front of comfortably.

People with eye disease, bipolar disorder or medications that make them sensitive to light should talk to a doctor before starting light therapy.

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Limits of the Research

The authors point out several caveats. Participants were mostly women (about 74 percent) and probably more active and better educated than the average senior. Light was measured only in two two-week windows, not continuously. And people who chose to start their lamp earlier may differ from late starters in ways the researchers could not fully account for.

In short, the findings are encouraging but come from a single study. They suggest that the simplest habit, getting bright light early in the day, may be the most valuable one.

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Sources

1. University of Surrey: "Boosting indoor light could help support healthy ageing in older adults in urban areas" – https://www.surrey.ac.uk/news/boosting-indoor-light-could-help-support-healthy-ageing-older-adults-urban-areas
2. Constantino et al., "ENLIGHTENme: Translating the Benefits of Self-Administered Daytime Light Supplementation to Older Adults in the Real World," Journal of Pineal Research 2026; 78:e70174 – https://onlinelibrary.wiley.com/doi/10.1111/jpi.70174
3. HealthDay: "Light Therapy Improves Sleep Among Seniors, Study Finds" – https://www.healthday.com/health-news/sleep-disorder/light-therapy-improves-sleep-among-seniors-study-finds
4. StudyFinds: "Owning a Light Lamp Didn't Help Older Adults. Using It Early Did" – https://studyfinds.com/early-am-indoor-light-steadier-activity-older-adults/

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