According to a recent Washington Post health and medicine report titled “The surprising health benefits of natural light exposure” (published March 7, 2026), even an extra 5 to 10 minutes of natural light exposure each day can profoundly regulate sleep, elevate mood, support metabolic health, and deliver a cascade of physical, mental, and behavioral advantages. This guest column, drawing on expert insights including from Stanford sleep researcher Jamie Zeitzer, highlights how natural light exposure — far more intense than indoor lighting (10,000–100,000 lux versus 100–500 lux, even on overcast days) — acts as a powerful, free regulator of human biology.…