Reset Your Summer Sleep Debt | Prepare for Sleep on Late Summer Nights with Light

As summer draws to a close, and restless nights continue, you may find yourself accumulating a "sleep debt" without even realizing it.

Let me state this upfront: for combating the heat of late summer nights, air conditioning and bedding are your primary weapons. On top of that, adjusting your "use of light" in the evening and morning will help prepare you for sleep. This article discusses how to make those adjustments.

What is Sleep Debt?

Sleep debt refers to a state where daily sleep deprivation gradually accumulates. Summer, with its heat making it difficult to fall asleep and causing frequent awakenings during the night, is a particularly easy time for this to build up.

The Ministry of Health, Labour and Welfare's "Sleep Guidelines for Health Promotion 2023" also highlights the use of light as a way to create an environment for quality sleep.

What Light Can Do on Late Summer Nights

Leaving temperature and humidity control to air conditioners and bedding, light's role is to "create the right environment before sleep." Before bed, avoid strong overall room lighting, and instead softly illuminate only your immediate vicinity. Even if you wake up in the middle of the night to drink water or adjust the air conditioner, minimal light will prevent you from becoming too alert.

For the flow of light at night, please also refer to How to Adjust Light in the Hour Before Bed, and for dealing with tropical nights, Bedroom and Light on Tropical Nights.

Mornings are Still Bright in Late Summer

In summer, the sun rises early, and you might find yourself waking up early due to the morning light, even if you finally managed to sleep. Control the morning light with blackout curtains, and then expose yourself to plenty of light when it's time to wake up. Thisメリハリ (sharp contrast) of "blocking light while sleeping, and basking in it upon waking" helps maintain your summer rhythm.

Small Tips for Avoiding Sleep Debt

Temperature and humidity are primarily managed by air conditioning and bedding. Light plays a supporting role in setting the mood.
Before bed, use minimal light in your immediate area and avoid bright screens.
In the morning, try to wake up at a consistent time and expose yourself to light.
If taking an afternoon nap, keep it short.

In Lipro's Case

Sunlight Sleep Light: For minimal light before bed or in the middle of the night. Stepless dimming from 1-100%, 3000K warm white light, top touch control, cordless, RG0 certified.
Sunlight Ceiling Light: Transitions from warm light in the evening to bright white in the morning. Dimming and color temperature adjustment from 3000K-5000K creates a distinct contrast between night and morning.

Lighting doesn't lower temperatures or cure sleep debt itself. However, creating a clear contrast in light between night and morning is an effective measure you can take every day during the late summer period.

Summary: Cool Down the Heat, Adjust the Light

To combat late summer sleep debt, prioritize temperature control, while using subdued light at night and plenty of light in the morning. With this contrast, let's adjust our rhythm for autumn.