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This article has been merged into our canonical guide: Bright light therapy for sleep.

What to read now

• Bright light therapy for sleep for protocol-level timing by condition.
• Turn off screens before bed for evening light control.

Quick reminder

Morning light generally shifts the clock earlier, and evening bright light generally shifts it later. Timing is the key lever.

Bottom line

• This page is now a pointer to the merged canonical guide.
• Use Bright light therapy for sleep for full timing protocols and safety guidance.

General education only. Individual timing plans can vary by diagnosis and schedule demands.

Educational content only; this is not personalized medical advice. If you have urgent symptoms, seek emergency care.