Why are police lights red on the left and blue on the right?

1 Answers
Haven
07/29/25 11:39pm
Red is a primary color in the warm color spectrum and serves as a warning, while blue is a primary color in the cool color spectrum, creating a sharp contrast with red to better capture attention. Below is an introduction to automotive lighting: 1. Headlights: Also known as car front lights or LED daytime running lights, they serve as the 'eyes' of a car, not only affecting the owner's external image but also closely related to safe driving at night or in bad weather. The use and maintenance of car lights should not be overlooked. The car light switch is typically located on the lever under the steering wheel, usually on the left side, where lifting or pressing changes the light. Emergency lights are either on the dashboard or below the steering wheel, generally red for visibility. 2. Other lights: Emergency lights are usually near the center console as the only red button; pressing it down activates the hazard lights. Fog lights are typically on the headlight lever with a fog light symbol; rotating forward turns on the front fog lights, and rotating backward turns on the rear fog lights. High and low beams may be on the turn signal lever or control panel; switching between them involves moving the lever up or down (left or right for turn signals, up or down for high and low beams). Emergency lights on the dashboard are marked by two overlapping triangles.
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