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The Uses of Colored LED Bulbs in Flashlights and Lamps
LED (Light Emitting Diode) lights are proven to be more efficient, lower in energy consumption, brighter and more versatile than any other lighting technology available today. The white light LED is useful in an assortment of general lighting applications where intense light is needed for long periods of time. Spotlights, flood lights, search lights, headlamps and flashlights all use LED technology to increase their light output.
Colored LED lights add more potential uses for this technology. Colored LEDs have been used in many formats, including traffic lights and signs, storefront signage, entertainment lighting, and home lighting designs. The colored LED started as a simple indicator light in stereo equipment, coffee pots and other household electronics and appliances. They however have significant benefits in other areas. In flashlights and handheld lights the colored lights are used for activities such as forensic investigations, night vision, and hunting.
The most common LED lights used in flashlights and handheld torches are white, red, green, blue, or ultraviolet light. Each color has specific benefits for use.
Green
A green LED light was one of the first in the spectrum to be used for night vision. It helps preserve night vision while allowing for some illumination. Hunters and fishermen prefer the green light because it is less likely to spook the fish or game. It also does not attract insects the way a white light can. Green is often used in military operations because, unless viewed straight on, it is difficult to pick up with the human eye. Green is also useful in smoke-filled environments because it does not “wash out” the field of vision like white light does.
Red
The red LED light is preferred by some for night vision because it often provides for a greater contrast. Red light is popular in military operations because it is difficult to pick up at a distance. This color is also often preferred by photographers and those using night vision scopes. Red is good for smoke or particulate-filled environments to avoid the refractory wash out. Red can be useful in night-time hunting applications. However, it does make it difficult to make out red lines or marks on maps and charts.
Blue
Blue light is a very mild light. It is great for map reading or any chart reading while still maintaining adequate night vision. Blue LEDs are popular with law enforcement investigators because they will pick traces of blood or bodily fluid that might not be visible to the naked eye. Blue light is also used by hunters to track injured animals by following blood trails. Search and rescue personnel find it useful for the same reason - searching for an injured person is easier if a trail can be established. Blue light is also the only light that will cut through fog.
Ultraviolet
Ultraviolet LED light can be harmful if shone directly in the eye, but it has some very useful applications. Just like the blue light, ultraviolet can detect bodily fluid that might otherwise be missed. It can also be used to detect certain minerals and proteins at the scene, even in soils. It is often used to detect counterfeits, in money, art and antiques. Ultraviolet light can be used to bring out fluorescent colors, as in black light applications. It can be used for coding and cryptic messaging. Fishermen may find this light useful in bringing their luminescent lures back to life. Ultraviolet light can be used to recharge any luminescent items, such as watch faces, compass needles, etc. This light is also helpful to the hunter needing to follow blood trails.
The outdoorsmen may find many uses for each color, but it is often difficult to carry multiple flashlights in a pack. Torches with multiple lighting options are a much better choice. These offer different color lights within the same torch and allow for easy switching. This places all of the lights at hand, for any application. Multiple color torches also prepare the user for any unexpected events.
Colored LED flashlights can be helpful pieces of equipment for a number of different people in hundreds of different situations. Whether used for criminal investigations, military operations, firefighting and rescue activities, hunting and fishing, counterfeit recognition, or general outdoor use, colored lights may be a better alternative than a traditional flashlight.
~Ben Anton, 2008
http://www.lightsandknives.com/color_le ... lights.htm
http://www.lightsandknives.com/color_le ... lights.htm
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