PEAK PERFORMANCEDays to result

Afternoon Sunlight Protocol

Regulate sleep-wake cycle

Problem it solves

sleep or experiencing jet lag

Best for

Individuals struggling with sleep or experiencing jet lag

Not ideal for

Those with certain eye conditions or sensitivities to light

Overview

Why this framework exists

The Afternoon Sunlight Protocol involves exposing oneself to natural sunlight in the afternoon to regulate the sleep-wake cycle and improve sleep quality. This is based on the principle that light exposure can influence the body's internal clock and melatonin production.

Core principles

3 total
  1. Light exposure in the afternoon helps regulate the sleep-wake cycle.
  2. Natural sunlight is more effective than artificial light for this purpose.
  3. Consistency is key for seeing benefits in sleep quality.

Steps

1 steps
  1. Schedule Afternoon Sunlight
    Make time in your schedule to go outside in the afternoon, preferably between 4 pm and 6 pm, to expose yourself to natural sunlight.
    Pro tipTry to spend at least 10-15 minutes outside during this time.
    WarningBe mindful of sun protection and avoid excessive exposure.

Checklist

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Examples

1 cases
Example Schedule

An individual might schedule a 15-minute walk outside each afternoon at 4:30 pm to expose themselves to natural sunlight.

OutcomeImproved regulation of the sleep-wake cycle and potential benefits for sleep quality.

Common mistakes

1 traps
Inconsistent Exposure
Failing to consistently expose oneself to afternoon sunlight can reduce the effectiveness of the protocol.

Origin story

How this framework came to be

Research has shown that light exposure, particularly in the afternoon, can help regulate the circadian rhythms and improve sleep quality. This protocol is designed to leverage this effect.

Source

Traced to primary
Source · PODCAST
Maximize Productivity, Physical & Mental Health With Daily Tools | Huberman Lab Essentials
Andrew Huberman · 2025
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