Teardrop Light 17
Teardrop Light 17 : Usage By Country: The color of a vehicle's emergency lights is useful to denote the type of vehicle or situation, but the relationship between color and service varies widely by jurisdiction. In North America the usual emergency colors are red and blue, with blue generally reserved for police in many jurisdictions and red reserved for fire departments and emergency medical services. In western Europe the emergency color tends to be only blue, with amber as a warning color for construction equipment, etc. In eastern Europe emergency vehicles use blue, or a combination of blue and red. In Asia the usual emergency color is red. By far the most common colors for the core emergency services to use are blue and red, and there are some arguments for using both. One study found that for flashing lights, red was more easily perceived in daylight, and blue at night. Furthermore, red has advantages in haze and fog, while blue stands out against traffic at night. On the other hand, a different study found that red had the quickest detection times at night
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