This week’s episode is about one of the most overlooked signals shaping your sleep, mood, energy and long-term health: light.
Most advice starts at the wrong end of the day. We’re told to stop scrolling before bed, switch on night mode, or buy blue-light glasses. Those things can matter, but they miss the bigger pattern. Modern life has flattened the rhythm our bodies evolved to expect: bright days, fading evenings and dark nights.
Many of us now spend our days indoors in light that feels bright, but is biologically dim. Then, just as the body should be winding down, we switch on ceiling lights, kitchens, televisions, laptops and phones. Finally, we sleep in bedrooms that often aren’t truly dark.
In other words, we live in biological twilight.
In this episode, we explain why light isn’t just something that helps you see. It is one of the body’s strongest timing cues, helping your brain, hormones, metabolism and sleep machinery understand when day begins and night has arrived.
You’ll learn why cloudy outdoor daylight still matters, why night mode only partly helps, why blue-light glasses are not the main answer, and how small changes to your morning, evening and bedroom light can give your body a clearer daily rhythm.
