Photography is all about light. Ultraviolet Photography, even more so. Almost everything in nature will fluoresce, or light up, under the UV spectrum lights to some degree. Some are more stunning than others, of course. My favorite part is discovering a petal pattern or tiny spider hidden in the leaves that I could not see with my unaided eye. Playing with light and the way it interacts with the lens does require some basic knowledge of how light works, and how your lens works.
In Reflected Ultraviolet Photography, only pure UV light hits the subject. The use of a UV transmitting filter is placed on the lens. The idea is to capture a spectrum not seen by our naked eyes, or by usual photographic methods. Layering spectral filters will help you get the look you want.
UV Induced Florescence photography works a little different. The process still uses the same ultraviolet as in Reflected UV photography. But the filter used on the lens has to absorb all ultraviolet and infrared light and must only allow the visible UV radiation to pass. UV Induced Fluorescence photography should take place in a darkened room, preferably with a black background, while wearing dark clothing.
Either set up is pretty easy to achieve, with the lighting and filters running a little less than the cost of a good lens. Having multiple filters will enable you to play around with the spectral bands, and your results. I have two flashes that I have altered to emit only UV light, combined with colored gels. The UV filters and macro lens do the rest of the work!
Are you interested in playing the spectrum?
Give it a try!