Image: BlackLight
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Description: 160W mercury-vapor "black light" ultraviolet bulb. It creates ultraviolet light with an electric arc through mercury vapor in a small quartz tube inside. The outer bulb has a dark blue-purple filtering material (Wood's glass is one type) which blocks most of the visible light, passing only the ultraviolet light. It emits long-wave (UVA) ultraviolet radiation, from the 253.7 nanometer mercury spectral line. These lamps are used mostly for lighting effects in theaters and stages.
Author: Mike796
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes
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