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Blacklight - Wikipedia
A blacklight (or often black light), 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 .... UV LED. Ultraviolet light can be generated by some light-emitting diodes,
How to wire UV ultraviolet LEDs experiment & tutorial - YouTube
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