The M12 Ultraviolet (UV) Flashlight and Lamp
This inexpensive lamp produces both longwave and shortwave ultraviolet light for examining fluorescent minerals and other items. It has an effective illumination distance of about 6 to 12 inches. This makes it a good lamp for classroom and office use, or for examination of hand-size specimens in the field. It is not powerful enough to search for fluorescent minerals in the field while walking.
The lamp requires four AA batteries (not provided) for operation. UV-blocking eye protection should be worn while using this lamp. Two pairs of UV-blocking polycarbonate safety glasses are included with the lamp. I have this kind of UV light.