noun (n)

• the state of being poorly illuminated(noun.state)

  Synonym:
  duskiness
  

  source: wordnet30
• the property of lights or sounds that lack brilliance or are reduced in intensity(noun.attribute)

  Synonym:
  subduedness
  

  source: wordnet30
• the quality of being dim or lacking contrast(noun.attribute)

  Synonym:
  faintness
  

  source: wordnet30
• The state or quality &?; being dim; lack of brightness, clearness, or distinctness; dullness; obscurity.(noun)

  source: webster1913