The built-in LED lights on some new routers really light up the action during cuts. But I can't justify buying a new router just for the pretty lights. Instead I added light to my old router by mounting an inexpensive flexible-neck LED penlight from an auto parts store with a rubber band. It works great! Just make certain the light is fastened securely and won't fall into the bit when running the router.
—Serge Duclos, Delson, Que.