Well....I tried the light/magnify combo from Rockler.....wasn't as great as I thought it would be.
Had a hard time finding a place to mount it. I've got the light and EZ Lift system on my DeWalt, so mounting it like the picture was hard to do...and made the arm heavier when I lifted it to move the blade to a new entrance hole.
I tried the clamp mount it came with and put it on my saw stand. That worked well, but I could never get the light to be in just the right place when I was cutting. Also, larger pieces of wood kept hitting the arm, when it was in the clamp mount. Also, I tried looking through it with and without my glasses on and it never seemed that "clear" to me.
The light was nice and it is a GREAT concept....it just didn't work for me...so I went back to the way I have always cut. I'll keep it...maybe play with it another day...like I said, it's nice....might just take some tinkering to get it to be perfect.