How Streetlight-Level Light Disrupts Mammal Immunity

Logosofia no Dia a Dia · May 9, 2026 · 32m

A new study from Tel Aviv University reveals that even minimal artificial light at night—at intensities equivalent to standard street lighting—disrupts the immune rhythms of wild mammals and leads to a 2.35-fold increase in mortality. Researchers built outdoor enclosures with semi-natural conditions for spiny desert mice and found that white LED illumination completely flattened daily immune cycles, rendering the animals' biological clocks unable to coordinate immune defense. The supervising professor reported that all light-exposed mice died, with pathology exams showing their immune systems…