They are the standard fluorescent low-energy bulbs handed out by the government (pah!) about a year ago allover the UK. Ive been told by a few mates they will work, but others say no. So i thought i'd ask some more in-the-know people Here are some pictures:
Those should work fine, the only question is what kelvin they are. I didn't see any markings telling if it is soft white, daylight, etc. I would probably choose to use it as supplemental light along with the primary bulbs for your growth cycle.
I also have a few of those doing nothing in the cupboard, I was going to add a few to my veggy area but as has been pointed out they do not have any markings on the bulb or box saying what Kelvin scale they are.