Since many UV tubes have a counterpart fluorescent tube that doesn't
cook one's eyeballs, it is a good idea to get one of those along with your
UV tube when building an Eprom eraser.  You can use the fluorescent tube
while testing to make sure the starter and timer are working right and to be
sure the case is light tight.  The extra expense is nothing compared to
what could happen if there is a light leak.

Al Williams writes:
>best way to do this is to go in a dark room and turn it on. You might be
>surprised to see light coming through plastic panels, or from hinges.

Martin McCormick