>F40 means - Fluorescent, 40 Watt. BL means Black Light. I don't know what
>350 means. These are the correct bulbs or I should say a correct bulb that
>will work well. Yes, they look like regular FL bulbs.
While having nothing against black light tubes, emulating Pete I have acquired
a sun bed with six foot tubes for use in class ( for twenty five pounds), why,
whenever I mention graphic arts high pressure mercury bulbs which are designed
to give light at a range of wavelengths suitable for alternative processes, does
there always seem to be a stony silence?
Terry King