Considering the fact that IR illuminators function like flashlight or torches While they emit only infrared light, improved look at its illumination assortment. 5 million kilometers (1 million miles) away from the Earth at what is named the 2nd Lagrange point or L2. (Note that these graphics aren't to scale.) https://lightweight-infrared-scop29516.madmouseblog.com/8519697/what-does-infrared-light-for-scope-mean