Posted by admin | Posted in Flashlights | Posted on 26-10-2009
Tags: flashlight, Flashlights, gear, led, shopping
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Beauty meets utility in police lights
The blinking police lights of police vehicles are so beautiful and colorful that if its blinking was not accompanied by the screeching of sirens, the lights would have given a carnival ambience to the street. While the colors are quite attractive, the utility value of different colors is also quite high.
With the police lights used on police vehicles, the color choices and their implications are decided by the laws of the respective states or countries to which the vehicles belong, and are not based on any intrinsic characteristic of the color. Red, blue, amber, and white are the most common colors used for police lights everywhere, though green and purple also find limited use in some places.
The police lights on police vehicles function as communication tools because different colors are used to convey different things. Flashing of the red light is an order to keep off and give way, while flashing of the blue light is a request to stop. Amber is flashed to tell other vehicles that there is some problem on the road and that they will have to move cautiously or turn back.
However, in the case of the colors of handheld police lights, it is not the law but the intrinsic qualities of the colors that will decide user preferences. At a crime investigation scene, the differently colored lights that police are able to use will substantially increase their chances of gathering evidence and solving the crime.
Blue police lights are used for examining a crime scene at night because blood trails show up better under the blue light. Some manufacturers also make special lights for hunters using a combination of red and blue LED lights. This combination is believed to produce the right type of light necessary to track the blood trail of a game at night. A subdued blue or red light is also recommended for use at night for police lights and as hunting lights.
Green light is used by fishermen going out to the sea at night because fishes are said to be attracted to green light. Crime investigation of police is unlikely to involve the luring of fish, but green police lights are good when going out to the sea in connection with any investigation.
Infrared lights are important for enhancing night vision. Night vision equipments rely on a process whereby the ambient light is converted into visible light by a chemical process. Infrared lights are used a lot for augmenting night vision in this way, since the light has the ability to increase visibility in darkness without actually using a light source that is visible to others. As such infrared lights are also an important part of police lights.
Ultraviolet lights are used for gathering evidence at the crime scene. Body fluids like urine, semen, sweat, and saliva, all of which contain DNA, are fluorescent by nature and show up well under ultraviolet lights. Ultraviolet light can also reach to more distance than to which ordinary light can reach. Because of these, ultraviolet lights are also used extensively as police lights.
Extreme Electrical Dynamics is a one-stop shop for police lights and many other items like Strobe Lights, Flashlights, Sirens, Deck Lights, etc. Please visit the site for more details of various items available - http://www.extremetacticaldynamics.com/
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