<unk>  fluorescent tubes. The violet glow of a<unk>  is not the UV light itself, but visible light that escapes being filtered out by the filter material in the glass envelope. A collection of minerals fluorescing under a<unk>  Fluorescent body paint. Paints and decorations that fluoresce under<unk>  are used in theater and several art forms. A<unk> , also referred to as a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave (UV-A) ultraviolet light and very little visible light. One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which<unk> ocks most visible light and allows through UV, so the lamp has a dim violet glow when operating.<unk>  lamps which have this filter have a lighting industry designation that includes the letters "BLB". This stands for<unk> <unk> ue". A second type of lamp produces ultraviolet but does not have the filter material, so it produces more visible light and has a<unk> ue color when operating. These tubes are made for use in "bug zapper" insect traps, and are identified by the industry designation "BL". This stands for<unk> ".<unk>  sources may be specially designed fluorescent lamps, mercury-vapor lamps, light-emitting diodes (LEDs), lasers, or incandescent lamps; although incandescents produce almost no<unk>  (except slightly more for halogen types), and so are not considered true<unk>  sources. In medicine, forensics, and some other scientific fields, such a light source is referred to as a Wood's lamp, named after Robert Williams Wood, who invented the original Wood's glass UV filters. Although many other types of lamp emit ultraviolet light with visible light,<unk> s are essential when UV-A light without visible light is needed, particularly in observing fluorescence, the colored glow that many substances emit when exposed to UV.<unk> s are employed for decorative and artistic lighting effects, diagnostic and therapeutic uses in medicine, the detection of substances tagged with fluorescent dyes, rock-hunting, the detection of counterfeit money, the curing of plastic resins, attracting insects and the detection of refrigerant leaks affecting refrigerators and air conditioning systems. Strong sources of long-wave ultraviolet light are used in tanning beds. UV-A presents a potential hazard when eyes and skin are exposed, especially to high power sources. According to the World Health Organization, UV-A is responsible for the initial tanning of skin and it contributes to skin ageing and wrinkling. UV-A may also contribute to the progression of skin cancers. Additionally, UV-A can have negative effects on eyes in both the short-term and long-term.
Blacklight
Wart
Bili light
Beauty Mark
Caul
Gauze
Lint 
MedFlight