Why are police lights red and blue?
Why are police lights red and/or blue?
If security cameras infra-red searchlights are below the range of human eyesight, then why do some cameras LED lights glow a dull red-ish colour at night? Why are blue and red neon lights illegal or restricted for commercial uses in Colombia? Why are blue and red neon lights illegal or restricted for commercial uses in Mexico? Why are blue and red neon lights illegal or restricted for commercial uses in Canada? Why are blue and red neon lights illegal or restricted for commercial uses in Brazil? What is the difference between red light, yellow light, and blue light on the cars of VIP and high-rank officers? Why are blue and red neon lights illegal or restricted for commercial uses in Argentina? Why are blue and red neon lights illegal or restricted for commercial uses in Venezuela? Why are blue and red neon lights illegal or restricted for commercial uses in Peru? Do police hate sports cars and/or red cars? Why are all traffic light colors, one color? General Knowledge: Why do ambulance/police car siren have revolving lights? (Observed specifically in India) Why do colors look more red in one eye and more blue in the other? Why are most of the flags red, blue and white? Why are red, white and blue such common colours for national flags? Why do we consider only red, green and blue as basic colors in pixels? What do different colors signify on cop cars in the US? What color does blue and red make? Why the colour of wires in homes are black, green and red? Why does most flags have red color? How red yellow green colors glow in traffic signals? Is it legal to run a red light at intersections in order to yield the road to emergency vehicles? Why are blue and red neon lights illegal or restricted for commercial uses in Honduras? Why do we call police officers "cops"? Why do railway traffic lights have green at the top and red at the bottom but road signals are the other way? What is the difference between Police and Traffic Police? Why are red yellow and blue are the prime colors? What are police codes? Why do some drivers turn on their headlights in daytime? Why do many people like the color blue?