We spend 90% of our time indoors, under artificial light, and many of us are unsure how much real sunlight we actually need—or fear we're getting too much. The Natural Light Method cuts through the confusion. Drawing on decades of consolidated research, Priya Anand Rao explains how to harness sunlight's benefits for better sleep, mood, and vitamin D levels while protecting your skin. You'll learn why morning light is a powerful circadian cue, how to find your personal safe exposure window based on skin type and location, and when protection is non-negotiable. This is not a pro-tanning or anti-sun book—it's a balanced, evidence-informed guide that helps you make thoughtful decisions day by day. From the science of UV to practical strategies for windows, clouds, and sunscreen, each chapter builds a toolkit you can use anywhere. Part of The Sagewell Wellness Library.