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Full Moon Cuts Sleep, But Screens Are Worse

10/26/2025

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Summary

Story summary

The full moon modestly reduces sleep by about 20 minutes, especially with little artificial light.
There is no consistent evidence that lunar phases trigger psychiatric crises, despite folklore.
Sleep loss can exacerbate bipolar disorder and schizophrenia in some cases.
Artificial light from screens poses a greater sleep risk than the moon.

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Story summary

The full moon modestly reduces sleep by about 20 minutes, especially with little artificial light.
There is no consistent evidence that lunar phases trigger psychiatric crises, despite folklore.
Sleep loss can exacerbate bipolar disorder and schizophrenia in some cases.
Artificial light from screens poses a greater sleep risk than the moon.