I have two of what many would consider to be "expensive" high end magnifying lights. I bought them from Judy Gale Roberts after having used them in her classroom studio. You can find them on her site here: https://intarsia.com/collections/hardware/products/new-led-daylight-slimline-magnifying-lamp It comes with 2 different diopter lenses that are 5" wide. It has little to no distortion even at the edges of the lenses.
I have been using mine for about 3 years now. I couldn't scroll without it. I need the light and the magnification. As I noted, it comes with two different lenses (1.75X and 2.25X) that you can swap in or out. I would say they are indeed high quality with little distortion. After buying the first one at Judy's, I decided I needed a second one for the second saw I had. Instead of buying another one from Judy and since this was a saw that was not my "main" saw, I thought I would save a little money and buy a cheaper one. I think I tried two. Neither of them were nearly the quality of the one bought from Judy's shop. The lenses were not the same quality and had a lot more distortion with them especially around the edges, and there were "shadows" that I don't get with the one I bought at Judy's. As a result, I got rid of those and got a 2nd one from Judy and haven't looked back. Well worth the expense in my opinion, especially if you use your saws as much as you do Kevin. MFRP is around $260. Judy's price is $152.10 and notes its $20 shipping (but also notes that shipping can vary - she usually only charges actual shipping cost.) This is in part due to how heavy it is (the lenses are very heavy) and the box is not small. It has a spring arm that clamps on. Mine are both clamped on my saws and I don't get any vibration that moves it.
When I bought the second one, I decided to look around and see if I could find it cheaper then I could at Judy's site. I looked at Amazon and the Manufacturer's site and both were more then at Judy's site. I just checked both again. On Amazon, there are 3 listings. 2 are much higher and then there is one listing slightly cheaper then Judy's and list it with free shipping ($149.95 and free shipping so perhaps a savings of about $2 on the light and the shipping cost.) I know if anything was wrong - Judy would attempt to make it right though. The Amazon listings I found are here: https://www.amazon.com/s?k=Daylight+Slimline+LED+Magnifying+Lamp&rh=p_89%3ADaylight&dc&qid=1556194395&rnid=2528832011&ref=sr_nr_p_89_1
It is $255 on the Manufacturer's site and appears to show free shipping from there: https://daylightcompany.com/slimline-led-magnifying-lamp-daylight-25030.html.html
I will also note that I did not have to pay shipping for the ones I bought from Judy because I live about 40 minutes away from her shop. The first one I bought while I was in an Intarsia class there and brought it home. The second one, I also bought when I went back for a second class. Because I live local, I didn't have to worry about shipping it home or getting it home if I had flown in for a class. I do know that if they every went out, I would quickly be seeking the same quality light as quickly as possible.
I know several others who have taken her classes have also purchased the light after using them in her classes. I know that @NC Scroller Scott also bought one when I bought mine as we were in the same class.