Ultra Violet lamps (UV) fall broadly into five main categories. Blacklight Blue these look black/purple when switched off, these are used in dark areas to make sensitive things glow such as bank notes, theatres etc. Then there are Blacklight lamps, these are white and used in insect traps and some ink/glue curing processes. Germicidal, these are highly dangerous and are used for disinfection of pond clarifiers. Lastly there are sun tanning and medical and printing lamps.
Should be treated with caution, make sure you buy the correct lamp.
Always check you have received the correct product before use.