It's not the only color for a cause Purple probably won't be the only porch light color you'll see. People use red porch ...

This is where the mysterious purple coloring could come in. It's entirely possible that over time, this phosphor layer has peeled away from the blue light, altering the color of the street lights ...

Question: I’m wondering about a light that seems to only be on at night on the traffic lights. It’s a small purple or blueish ... What you are talking about is a blue light and they are ...