Huberman Winter Light Activation

Follow the Andrew Huberman winter morning routine to set circadian rhythms with bright artificial light, morning sunlight, hydration, and delayed caffeine.

4 time blocks, 40 minutes in total.

Time blocks

Bright Indoor Light and Hydration: 10 min
Turn on a 10,000 lux lightbox and drink water with salt or minerals
Body Temperature Elevation: 5 min
Do gentle dynamic movement or jumping jacks to raise body warmth
Outdoor Sunlight Viewing: 15 min
Look toward the morning sky without sunglasses for 15 minutes
Delayed Caffeine Transition: 10 min
Hold off on coffee and review daily goals

About this routine

Neuroscientist Andrew Huberman emphasizes early bright light exposure as a foundational anchor for circadian rhythms, mood, and daytime focus. During winter months when natural sunlight is limited at wake time, the Andrew Huberman winter morning routine adapts by substituting high intensity artificial light early on, followed by outdoor sunlight once the sun rises.

Light entering the eyes stimulates specialized retinal ganglion cells, signaling the brain to suppress melatonin and initiate cortisol production for alertness. In winter, natural light levels outdoors are lower, requiring longer outdoor exposure alongside artificial lightbox illumination to achieve adequate neural stimulation.

Alongside light viewing, this sequence incorporates early hydration with minerals, brief movement to elevate core body temperature, and a deliberate delay in caffeine intake. Postponing caffeine until later in the morning prevents afternoon energy crashes by allowing natural adenosine clearance.

Why this routine works

Sets circadian alignment during short winter days
Improves early morning alertness and mood
Helps prevent late afternoon energy crashes
Supports core body temperature elevation after waking

FAQ

What is Andrew Huberman's winter morning light recommendation?

Huberman recommends turning on bright artificial lights or a 10,000 lux lightbox immediately upon waking if it is dark outside, followed by 15 to 20 minutes of outdoor sunlight once the sun rises.

Why does Huberman delay caffeine in the morning?

Delaying caffeine until later in the morning allows the body to clear accumulated adenosine naturally, helping prevent an afternoon energy crash.

How long should you look at sunlight in winter?

In winter or on overcast days, Huberman recommends viewing natural sunlight outdoors for 15 to 20 minutes without sunglasses.

Sources

Huberman Lab Podcast: Using Light to Improve Health, Sleep & Mood
Huberman Lab Podcast: Toolkit for Sleep