Gray skies, relentless rain, and dim light can send your morale plummeting. That's because light precisely regulates melatonin (the sleep hormone) and serotonin (the key to well-being and energy). Without enough, your body overproduces melatonin and skimps on serotonin. To balance these hormones, you need exposure to at least 2,500 lux of light. The catch? On gloomy winter or spring days, natural light rarely exceeds 1,500 lux. The proven solution: light therapy. This approach involves using a lamp daily—ideally in the morning—that mimics the solar spectrum (minus infrared and UV rays). No need to stare directly at it; just keep it in your field of vision while painting your nails, eating breakfast, or working. Exposure time varies by lamp intensity and distance: for a 10,000 lux model, it's 30 minutes at 20 cm or two hours at 60 cm. Today's options include white light (more intense) or blue light (slightly less powerful but equally effective). Positive effects typically kick in after two weeks, helping you regain your rhythm.
Our top pick: Philips Energylight Energy Up lamp, €200, available in white or blue light.
