High Quality Content by WIKIPEDIA articles! A black light or blacklight blue, also referred to as a UV-A light or (sometimes erroneously) an ultraviolet light, is either a lamp whose bulb has either been made out of Wood's glass which filters out a large proportion of the lamp's usual visible light and only allows the light nearest the short-wave (near ultraviolet, UVA) range of the spectrum to pass, or been lined with phosphor which will produce a similar effect (see below). A typical unfiltered lamp will appear more or less white or transparent when turned off; fluorescent filtered lamps use the same phosphors as fluorescent black lights but appear black when turned off. Bulbs which have this filter have an ANSI designation that includes the letters "BL" (for a black light) or "BLB" (blacklight blue) somewhere in the designation— for example, "F40T12/BLB" for a common 4 feet (1.2 m) 40-watt fluorescent black light bulb. Данное издание представляет собой компиляцию сведений,...

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