Are these Infrared lights that you cannot see with human eyes, or are they
LED’s that light up?
The Infrared (IR) light is electromagnetic radiation with longer wavelengths than those of visible light, which is not visible as they are in extending from the nominal red edge of the visible spectrum. The LED lights made with the Infrared LED cannot see with human eyes. The similar example we always meet in our daily life like the security camera, the Infrared LED are used in this device.