Unrelated, but I really want to take the opportunity:

How can one know what is dangerous for the eyes or not? Years ago I got an "IR illuminator" (from aliexpress, probably) that I wanted to use with my raspberrypi NoIR camera, for fun. Say filming myself during the night to see how much I move while sleeping, or making my own wildlife camera trap.

But I was scared that it could be dangerous and never used it (I tested it in an empty room, but that was it).

Is there a safe way for a hobbyist to get an IR illuminator and be sure that I won't make somebody blind with it?