If you’re used to working through a microscope, you’ve probably noticed that the angle of the light greatly affects how your workpiece looks. Most of us prefer the relatively flat lighting provided by a ring light, but variable angle side lighting can be useful too, especially when you’re peering inside ICs to make sure the silicon is what it’s supposed to be.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/04/09/adjustable-lights-help-peer-inside-chips-with-ir/