I have no idea what a "Vitamin Light" is, I assume they are saying it helps with D3 production but I don't know if that is the brand or not. Lighting for beardies (and really most lizards) is important. I am not a fan of the CFL style bulbs as their UV output is very low. A lot of people swear by the Mercury Vapor bulbs, however I prefer to use a 50 Watt (wattage is dependent on ambients of the house etc, 50 works for me in SoCal) Flood Lamp for the hot spot and for UVB I use T5HO fixtures with a 10.0 HO bulb. For what its worth that is my 2 cents.
http://www.zoomed.com/db/products/En...D=2&SearchID=5 - Bulb