The four bulbs side by side,
The bulbs are (but not in order of the picture) a 10,000K, an Actinic, a 50/50 (actinic/6500) and a 6500K
The colouring is fairly obvious, really blue is actinic, next shade down is 10K, after that is 50/50 and the almost yellow looking one is the 6500.
http://ca.f2.pg.photos.yahoo.com/ph/...m=102_0282.jpg