I have a lot of experience with lighting the works in my collection, as I'm very finicky, and I have found that Halogen works best for most paintings, and very importantly, You need to use flood halogens for loose impressionistic works, and spotlights work best for tight porcelain handling as in Bouguereau, Alma-Tadema and Lord Leighton.
Sometimes both are needed as I currently have 3 lights, 75 watt halogens being used to illuminate Frank Dicksee's Yseult. Two of them are floods and one is a spot.
It's also incredibly important to judge the angle of inflection as glaring will be minimized if an angle of 30 degrees or less is used from eyeballs fixtures aimed down at the work.
Fred
