Try this:
http://www.SYLVANIA.com/prodinfo/news/ The Sylvannia catalog can provide much info on all types of lamps.
And if more info is needed on color, try the IES Handbook. Color is rated in degrees Kelvin, and 4100K is a yellow color (if my memory serves me correctly), 3500K is more to the natural sunlight. We typically use 4100K bulbs in some pharmaceutical manufacturing process areas.
