LEDs and colors

Some LED products, especially LEDs on flashlights, have different beam colors. This is not the use of hidden organs to make them look beautiful, different light colors have different applications. Here's a quick look at the most common colors and their practical uses.

White light has perfect color characteristics, but it can damage the vision of adapting to dark light. It takes a certain amount of time to re-adapt after a certain light source is extinguished.

Red light is usually used for night vision. Red light does not cause your pupil to shrink excessively and the eye does not need to re-adapt to the darkness once the red light is extinguished. Red is also usually used as a "safe" color in monochrome photo processing because it does not damage the film being printed.

Yellow light has some advantages of red and white light. Another advantage of yellow light is that when you read, you reduce the reflection and glare of eye fatigue caused by long reading.

Green light can also be used as night vision, and green light is also especially useful for reading maps or charts at night. It is not so easy to be discovered by night vision equipment, it is easy to be discovered by the human eye, and the brightness of green light is lower than that of red light.

Blue light can be used to read maps at night and is often favored by military personnel because blue light increases the level of contrast. It can also be used as a background work light for theaters and performances.

Blue-green light has the advantages of night vision similar to green and blue light, but with the improvement of the color characteristics of blue-green light, some users prefer to use blue-green light for this reason.

Infrared red light is used with night vision equipment. Otherwise, people's eyes can't see infrared light.

Ultraviolet light is often used to identify whether banknotes are forged. Some UV LED illuminators are popular at nightclubs and parties, and they are used to make fluorescent materials emit brighter light.

Whether the color of light and the color of its wavelength are visible is determined by its wavelength. The wavelength of light is in nanometers, which is also a billionth of a meter. The light emitted by the LED is almost identical, that is, it is almost always at a wavelength, giving a very pure color. Below is the color of the light and its wavelength.

Infrared red light 4600nm - 1600nm - invisible light

Low infrared red light 1300nm - 870nm - invisible light 850nm - 810nm - almost no visible light,

Near-infrared light 780nm - When viewed directly, a very dim cherry red light 770nm can be seen - when viewed directly, a deep cherry red light 740nm - deep cherry red light can be seen

Red light 700nm - deep red 660nm - red 645nm - bright red 630nm -
620nm - orange red

Orange light 615nm - red orange light 610nm - orange light 605nm - amber light

Yellow light 590nm - "sodium" yellow 585nm - yellow 575nm - lemon yellow / light green

Green 570nm - Light Green 565nm - Cyan 555nm -
550nm - bright green 525nm - pure green

Blue Green 505nm - Cyan / Blue Green 500nm - Light Green Cyan 495nm - Sky Blue

Blue 475nm - Azure Blue 470nm - 460nm - Bright Blue 450nm - Pure Blue

Blue-violet 444nm - dark blue 430nm - blue-violet

Purple 405nm - Pure Purple 400nm - Deep Purple

Near ultraviolet light 395nm - dark red with reddish

UV-A type ultraviolet light 370nm - almost invisible light, when exposed to wood glass, it shows a dark dark purple.

White light-emitting diodes have a yellowish to purplish white light. White light-emitting diodes have color temperatures ranging from as low as 4000°K to 12000°K. Common white light-emitting diodes are typically in the range of 6500°-8000°K.

Editor: China Lighting Network / Leaves