Incandescent light has very little U rays, to get more UV use bare fluorescent lamps (lens materials tend to filter UV rays). The following two paragraghs were copied from a web site. CFL that they refer to is Compact Fluorescent Lamp, they are sold in all stores as replacements for incandescent lamps but 4 foot fluorescent tubes in a shop light will also emit UV light.
"One thing that is not talked about much is that CFLs emit more ultraviolet (UV) light than an incandescent bulb, which produces virtually none. Light in a CFL starts out as UV from excited gases, and is made visible by phosphors coating the inside of the tube/bulb. Incandescent light is mostly infrared emitted by heating the filament to super high temperatures (leading some to call them "heat bulbs" instead of "light bulbs"). Most of the UV from a CFL is filtered out in the conversion, but there is still some.
Manufacturers say, however, that there is no health risk and that eight hours of exposure to CFL UV is about the same as one minute in full sunlight. But, photographs, artwork, some fabrics, and some photoreactive chemicals used in furniture finishes are susceptible to degradation from any increased levels of UV over time. So this is something to consider"