See
I disliked my Aristo fluorescent ringlight because it was big and got in the way, and the light lacked contrast.
Four 1-watt Luxeons with 30-degree Fraen molded collimators do an excellent job. I calculate the full-power luminous intensity at the worksurface to be about 30,000 lux -- about 3X the intensity of tropical daylight. The light is physically very inobstrusive, does not get in the way at all. Nothing runs hot or even warm. It can easily be dimmed with no color shift. The illumination is bright, white and very uniform.
I get only very faint shadows from tools like tweezers, soldering iron, etc in the work zone. Contrast is excellent; it is easy to inspect solder joints. Because the brightness of each Luxeon is individually controllable, I can "drive" the light around some by varying relative brightnesses.
This project was well worth the trouble!