Hey Gundari, if you are still around (sorry just read thread), I have a Philips fouro tube box. On the box it states:
soft white = 3000k
cool white plus = 4100k
30 watt bulb.
Just in case you can read the tube..sorry all I have are soft white right now. Don't know if this helps or if maybe I am too late.

good luck
Fishens:jointsmile: