I am a little late to this thread but here is some information that maybe of interest.
I am with a company that developed a "daylight" simulation bulb named SoLux. SoLux is used by many different glass artists for display purposes at craft shows and in galleries. To name a few of these artists - John Kuhn, Blake Street Glass, Josh Simpson, Christopher Ries and I could name at least a dozen more.
The light from SoLux has been engineered to simulate the spectrum of daylight at several color temperatures. The one that is preferred by most glass artists is the 4100K SoLux.
A few technical details for those who like those things... The Color Rendering Index (CRI) for all SoLux bulbs is 98+. The reason it is so high is because the specturm is smooth and not like the spectrum from fluoresencent lights which is spikey. Smooth spectrums more closely simulate the spectrum from daylight than spikey ones.
SoLux is a low-voltage MR16 format bulb (track lighting is the most familiar way to incorporate its use). They are available in four different beamspreads. SoLux is used in many world famous museums around the world including the Rijksmuseum, the Van Gogh museum and many others. It is currently the bulb that is specified to go into the glass museum in Toledo.
Besides the superior spectrum, SoLux is a point light source and this helps gives a better presentation and clarity to glass work.
I could go on.... however, if you have questions you can call me (800-254-4487) or email me ... phil AT solux DOT net
Phil Bradfield, Ph. D. VP-Tailored Lighting Inc Where SoLux was invented