These are some shots of my blacklights from (standard disclamer of the fact that the camera doesn't really do the blacklight or the UV responsive stuff justice for color correctness, but it looks good and close enough)

The first pic is the fan on, sitting on top of the cold cathodes. the cold cathodes are sitting on my epson c82 printer, as shown in my second pic, epson's bright white paper glows bright blue. The fan as seen the other direction (i.e. closer to the UV tubes) when not on, is the 3rd pic

The 4th and 5th ones are the same pic, one with and one without flash. the fan is in a shroud made of cardboard and duct tape attached to my heater core radiator for my future watercooling setup, the last picture is the fan glowing through said radiator.