Homebrew PCBs

I am wanting to build a UV light box.  I have read as many internet 
articles as I could find on the subject.  Some articles will 
recommend certain bulbs while other articles will say to stay away 
from those that were recommended.  What is the best bulb to use that 
is easily obtainable?  I have read an article that suggested using 
bug zapper bulbs.  My local Home Depot carries 15W and 40W versions 
of the replacement bulbs for the Zapper models.  Would this type of 
bulb work?  I have also read about breaking the glass shell of a 
mercury vapor bulb and using the internal tube as a UV source.  I 
don't plan to make large circuit boards (no larger than 6" square).

Thanks!!