I guess its 2700k as it's a general purpose household bulb (90% certain), if you send a picture of it on then can guess a bit better. Look around the plastic base of the bulb it may say on that?

look at the picture attatched: you can work it out roughly yourself.

I have noticed The US and the UK CFL's vary in wattage usage and equivilence, eg. in the UK a 20watt (even an 18watt phillips brand) = 100watt output, for 150watt output, the bulbs are only 30watts.... strange???