Light 7 min
How Light Affects Sleep
How light timing, brightness, duration and color influence your body clock, why evening and nighttime light can make sleep harder, and practical changes to try.
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Light Guides
Light 6 min
Morning Light and Your Circadian Rhythm
Why morning light helps anchor your body clock, how outdoor and indoor light compare, what changes in winter or on dark mornings, and how to experiment.
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Light 6 min
How Dark Should Your Bedroom Be?
Why nighttime light can affect sleep, common sources of bedroom light, a practical order for reducing it, and why complete darkness isn't necessary for everyone.
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Light 7 min
How Screens Before Bed Affect Sleep
What studies actually show about screens and sleep, why light and content are separate issues, and practical experiments to try instead of strict screen bans.
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