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.
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.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).