That has led to years of purple streetlights that seemingly appear and then disappear across the nation The purple glow has been described ... coast-to-coast phenomenon caused by faulty LED ...

This blue-green glow was so bright it could light up the night sky. At times, lasting for months and stretching as far as 40,000 square miles. This rare phenomenon was coined “milky seas” and ...

A research vessel that happened upon this phenomenon in 1985 collected water samples that contained a bacteria called Vibrio harveyi, which they hypothesized might be the source of the glow.