I use twelve solux mr-16's with two tracks I got at the home depot. They're diffused with lee quarter white frost. I get perfect even light against a metallic 12'x8' wall. Compared to a Normlicht viewing system this set-up is inexpensive. Prints are held in place with rare earth magnets. This system works great and other than photo-floods I don't know of any other bulbs that provide the full spectrum output of the solux's. But I color correct a lot and that's why I chose solux. If I had 20' ceilings than I could use fewer bulbs to get an even spread. Try this with low ceilings and you'll be looking at glare more than the picture. Use a bare bulb and the light will be shining in your eyes - best to get a par of some sort.