If you're working with UV reactive materials CFLs radiate enough UV light to really mess you around, unless you're using the red or yellow coloured ones. I doubt it will have any serious effect on nic though. I just like to be cautious.I'm really curious about this now. I don't think there's a drastic amount of UV coming off of CFLs though? Irrespective, I don't think I use enough nic to notice in my own mixes..