What's IR Illumination

Applies to:

All Reolink cameras 

At present, the infrared LED on the market is also known as infrared emission tube or infrared light. The wavelength is mainly 850nm, 940nm, and 880nm, but 880nm is not commonly used(do not introduce it later). 

What is the difference between 850nm and 940nm IR Illumination?

Here we will introduce the main difference which is mostly concerned by the customer. 

850nm has the red explosion and 940nm has NO red explosion. Also, the 850nm has more details and greater distances than the 940nm:

What is the red explosion?

It refers to the infrared lamp appears visible red dots in working mode. Therefore, in need of concealment, 940nm IR Illumination is a good choice. 

So far, all Reolink cameras use 850nm IR Illumination.