Solar tube lighting system is shining achievement for USAG Daegu energy team. By Intern Bok, So-jeong November 20, 2017. Share on Twitter; Share on Facebook; Share on Reddit ...

A light pillar’s light usually comes from natural sources—i.e. the moon, though solar pillars also exist—but these particular pillars reflected off the artificial glow of civilization and ...

Light pillars that form over street lamps are often tinted orange. These pillars of light are often best seen at night, but that's not the only time that light beams can suddenly appear in the sky.