Any UVB in 24w CFLs (cool spectrum)?

I added 10 24w CFL globes to my grow towards the end of veg. We're about 4 weeks into flower and I was thinking of adding some UVB CFLs - like the ones you get for snake enclosures - but then I thought that if all I need is a little bit of UVB, would the CFLs I already have provide any?

Thanks in advance.

Shameless bump! Please folks. Kind of need to decide stat.