Why Turning Off the Big Light Can Help You Wind Down as the Nights Draw In

In early October the sun in London sets at around half past six, and by the end of the month, once the clocks go back, it will be gone before five. That means most of us now spend the whole evening under electric light, and for a lot of homes that means the big light: the one in the middle of the ceiling, bright, flat and on from the moment you get in until the moment you go to bed.

There is a reason so many people quietly dislike it. Your body keeps track of night partly through light. As the evening gets darker, it begins releasing melatonin, a hormone that helps signal that the day is ending. Bright light in the evening tends to hold that signal back, and you do not need a phone screen in your face for it to happen. Ordinary room lighting is enough.

The clearest look at this came from a study led by Joshua Gooley at Brigham and Women's Hospital and Harvard Medical School, published in the Journal of Clinical Endocrinology and Metabolism in 2011. Researchers had 116 healthy volunteers aged 18 to 30 spend the eight hours before bed in either ordinary room light or dim light, over several days. Compared with dim light, room light delayed the start of melatonin release in almost everyone and shortened the time it was present overnight by about 90 minutes. In other words, the body's sense of how long the night is got shorter, simply because the lights were up.

That does not mean the big light is ruining your sleep, and it is worth being honest about what the study did and did not show. It was a lab study with young adults, it measured a hormone rather than how well people slept, and real homes are messier than a research ward. But it does give some weight to something many people already feel: that a bright room at nine o'clock keeps you a bit more switched on than you would like.

The kind fix is small. Once you have eaten and the jobs are done, try switching off the ceiling light and using one or two lamps placed low, near the sofa or on a side table, ideally with a warm, soft bulb. Light that comes from below eye level and pools in corners feels more like the end of the day than a flat white wash from above. If you need brighter light for cooking or reading, keep it close to the task rather than lighting the whole room.

It helps to make it a cue. The same small action each evening, big light off, lamp on, curtains drawn, can become the moment your evening changes gear, a bit like taking your shoes off when you get home. Over a few weeks it starts to mean something, and the dark outside the window feels less like the day was cut short and more like permission to slow down.

Sound can work the same way. A quiet, steady background gives the room a softer edge, especially if the street outside is noisy. In Create Your Zen, try the forest with rainfall layered underneath and a crackling fire on low, then leave it playing while the lamp does the rest. None of this will fix a long run of poor sleep, and if that has been going on for a while it is worth a chat with your GP. But on a dark October evening, turning off the big light is one of the easiest kind things you can do for yourself.