The other side of the problem, besides the lights themselves, are the shop construction and the finishes of the surfaces. I have a 3 car garage that fits my one car and also tries to fit all my tools. Only 2 walls are sheet rock, and they are mostly covered with open shelving. There is no ceiling, just open framing above. The floor is ordinary unfinished concrete. Covering open framing with sheet rock, ceiling and walls, having storage covered with doors, and then painting everything white (floor, too!) makes a huge difference with the light being reflected back from the surfaces from all directions. Bright lights by themselves with dark room surfaces act as point source spot lights, causing glare, shadows, and lower overall light levels. It is much more economical, as well as cheerful, to have extensive reflective white surfaces. This will also save on buying excessive lights and paying a large electric bill. Those lights also help to overheat the shop in warm weather. Now I just need to follow my own advice! Actually, my plan is to move at some point soon so I am waiting to do all that at a new place...