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Blacklight fluorescent tubes. The violet glow of a blacklight is not the UV light itself, but visible light that escapes being filtered out by the filter material in the glass envelope. A blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave ultraviolet light and very little visible light.
Some coupons and tickets use colorful black light inks. On many German locomotives the control panel labels were printed with black light paint and a black light source was provided in the cab. This left the driver with full night vision while still enabling him to distinguish between the different switches and levers to operate his locomotive.
UV LEDs emitting near-ultraviolet light are used to read messages written by UV markers. The near-ultraviolet radiant energy is also called black light with a wavelength of 380 nm, which falls just outside the visible spectrum. The lamps used have very narrow bandwidth, compared to regular fluorescent black lights.
Everything you need to know about black light tattoos — the risks, the rewards, and (of course) the proper aftercare — plus a firsthand account from yours truly.
These UV wavelengths are found in sunlight and many artificial lights, but the paint requires a special black light to view so these glowing-paint applications are called 'black-light effects'. Fluorescent paint is available in a wide range of colors and is used in theatrical lighting and effects, posters, and as entertainment for children.
A blacklight poster or black light poster is a poster printed with inks which fluoresce under a blacklight. [1] The inks used contain phosphors which cause them to glow when exposed to ultraviolet light emitted from blacklights.