I would recommend you recess the LED light into a groove so that the light is shielded from emitting out to the sides - which for me creates terrible glare when I'm trying to see the part being machined. You can see what I'm talking about in this photo. You want most of the light directed downward and shielded from the operator.
View attachment 398322
Also, give some consideration to how the wires for the LED are secured when they exit the mounting ring. I've posted my solution to this challenge
here. Also have some drawings for a version that fits the PM-935
here that might be useful as a guide.