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gloom
Sign in to saveupright|thumb|Gloomy mudflats at Bo'ness in Scotland Gloom is a low level of light which is so dim that there are physiological and psychological effects. Human vision at this level becomes monochrome and has lessened clarity.
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upright|thumb|Gloomy mudflats at Bo'ness in Scotland Gloom is a low level of light which is so dim that there are physiological and psychological effects. Human vision at this level becomes monochrome and has lessened clarity.
==Optical and psychological effects== Light conditions may be considered gloomy when the level of light in an environment is too low for the proper function of cone cells, and colour vision is lost. In a study by Rothwell and Campbell, light levels described as "gloomy" fell between 28 and 3.6 cd/m2.