For example, green porch lights bring awareness to ... Here's a closer look at the purple porch light meaning. If you ever see a purple porch light, pay attention. It's there to bring awareness ...

Whether green is visible also "depends on what stuff there is in the atmosphere," Courtial said. Particles can scatter blue and purple light, making green light more apparent. Courtial ...

Such is the case for the sweeping purple and green lights that ... and appears as a streak of mauve-colored light accompanied by distinctive green bands, often referred to as a picket fence.

The oceans were likely once a vibrant green ... of purple sulphur bacteria," said John. The aging sun will also "become brighter, leading to increased surface evaporation and intense UV light ...

Instead, they also possessed a second pigment called phycoerythrobilin (PEB), which excels at absorbing green light. As these cyanobacteria ... the oceans may appear purple due to intense volcanic ...

The bright, glowing purple hues oddly pop among the traditional green, yellow and red stoplights ... according to Florida Power & Light. About 10 years ago, most cities in Palm Beach County ...