This Cranwell's frog fluoresces green in blue light Courtesy of St. Cloud State University, Photo by Jennifer Lamb and Matthew Davis Common newts, frogs, and salamanders may look muddy brown or ...

Rockefeller Center is replacing the neon lights of three marquees at the landmarked 30 Rock for more eco-friendly and energy-efficient LEDs.

Red, green, yellow and blue neon-lit billboards illuminated the night, an emblematic part of the city’s visual style. As Hong Kong developed, its colourful streetscapes gradually faded from view.