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Light heals: How a place in a hospital room affects the length of hospitalization

10.11.2025 | 2 minutes of reading | Spectrasol

It may sound like a small detail, but where you lie in a hospital room can play a bigger role than it seems. A major fifteen-year study from South Korea monitored over 85,000 patients and showed that those who had a bed by the window and received more daylight recovered faster than their neighbors by the door.

Those patients? On average, their hospital stay was 0.43 days shorter. It may look like less than half a day, but with thousands of patients it becomes a huge effect — both for hospitals and for patients who can return home sooner.

Daylight isn’t just “nice to look at.” It helps stabilize the sleep cycle, reduces stress levels, and supports the immune system. All of this together means faster treatment progress, better sleep, and greater physical and mental comfort and vitality.

But not all patients can have a bed by the window. In such cases, full-spectrum lighting that mimics natural daylight can be a solution. Research shows that this type of lighting can have very similar effects — it supports the circadian rhythm and may speed up recovery.

For hospitals, it means higher productivity; for patients, a quicker return to normal life. And so maybe next time you end up in a hospital, you’ll have a good reason to ask for a place by the window.

Source of the study here.

Translated using AI

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