Method
Bright light in your eyes right after waking
Morning bright light phase-advances the body clock so evenings get sleepier earlier.
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Right after waking, get a lot of bright light — daylight by a window or a 10,000-lux lamp for 20–30 minutes. This isn’t about mood: morning light phase-advances the body clock, so sleepiness arrives earlier in the evening. It works best done daily at a fixed time, before you reach for your phone.
Helps with
Resources & links
3 sources
What the research says
Scientific grade verified against the literature. No entries = no direct studies (graded from mechanism/experience).
- Clinical Practice Guideline for the Treatment of Intrinsic Circadian Rhythm Sleep-Wake Disorders (ASWPD, DSWPD, N24SWD, ISWRD): An Update for 2015 (AASM)guideline · 2015
- Attention-Deficit/Hyperactivity Disorder and Delayed Sleep Phase Syndrome in Adults: A Randomized Clinical Trial on the Effects of Chronotherapy on Sleep (van Andel, Kooij et al.)RCT · 2022
- Correcting delayed circadian phase with bright light therapy predicts improvement in ADHD symptoms: A pilot study (Fargason et al.)cohort study · 2017
- A randomised controlled trial of bright light therapy and morning activity for adolescents and young adults with Delayed Sleep-Wake Phase Disorder (Richardson et al.)RCT · 2018
What the grade means
A A — strongest evidence: meta-analyses or RCTs directly confirm it works (or, for diagnostic tools, strong validation of accuracy).
B B — good evidence: a single RCT, or a strong mechanism with supporting studies.
C C — weak / preliminary: a plausible mechanism, but few direct, controlled tests.
D D — no evidence: theory or isolated anecdotes, no studies.
Applies to: ADHD Autism AuDHD