Lighted magnifiers are handy as heck to have. I spent several years finding mine, but you have me beat, I paid $5 for mine. Now I can't live without it.
p.s. If it didn't come with hardware, you can glue a wooden block to your table with a hole a little smaller than the endposts largest diameter. If you'll notice it's tapered. Use clamps and good woodglue. I was lucky, I mounted mine on my workbench in the garage by just drilling a hole in my bench.