Skip to main content

Junk Light Exposure

Meaning

Junk light exposure is a colloquial term, used in the wellness and chronobiology space, to describe chronic, mistimed, or inappropriate exposure to artificial light sources that disrupt the body’s natural circadian rhythm and hormonal balance. This typically refers to low-intensity, broad-spectrum light, especially blue-enriched wavelengths, encountered indoors after sunset or during the night, such as from electronic screens or conventional indoor lighting. This exposure sends conflicting signals to the brain’s master clock, impeding the transition to a restorative sleep state. Minimizing junk light is a foundational component of modern sleep hygiene and hormonal optimization protocols.