What are the red lights around CCTV cameras?

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What are the red lights around security cameras

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What are the red lights around security cameras?


Modern Infrared CCTV cameras use infrared LED lighting (red lights) positioned around the outside of the camera lens in order to capture information. Even in areas where there is absolutely no light.


Let’s break it down one by one.


The cameras and these LED’s are often found on are CCTV cameras.


CCTV cameras are used for security purposes and so it would be pointless if the cameras cannot see anything at night.

It would also be pointless to have large lamps shining light in all possible corners, It could make sense to use lamps on a public road but not on private property.

However, if one were to even arrange for lamps, if some miscreant wanted to create some mischief, he could easily knock out the lamps using stones or just kill the power in a particular area.

These LED’s solve this problem by emitting light, but in the infrared wavelength.

Humans can see visible light which is in the wavelength from 380nm (violet) to 750 nm (red).

Wavelengths beyond this range are invisible to human eyes. Thus cameras use the Infrared (700 nm to 1100 nm) wavelength as a source of light. This way, they capture the infrared light bouncing off various objects and are able to get a black and white picture of the surroundings. Since the wavelength of the Infrared light is not visible by humans, they cannot see anything and darkness prevails.

Infrared light is also the reason why the LED’s have a dim red glow at night.

The reason they don’t use Ultra Violet light (100 nm to 400 nm)as a source is because UV light is known to cause skin tan and burns.


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What are the red lights around security cameras

Do you really need to upgrade to WiFi 6 Reference: Nikunj Bhatia ( Photgrapher ). ” Why are there LEDs around a CCTV camera? ”  originally appeared on Quora, the place to gain and share knowledge, empowering people to learn from others and better understand the world.

What are the red lights around security cameras

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