Because IR illuminators operate like flashlight or torches Despite the fact that they emit only infrared light, superior think about its illumination variety. five million kilometers (1 million miles) from the Earth at what is named the second Lagrange issue or L2. (Note that these graphics are not to scale.) https://infraredlightforscope20748.total-blog.com/what-does-infrared-light-for-scope-mean-52926976