lightfulness

From lightful (adjective) (any sense) +‎ -ness (suffix forming nouns).

• enPR: lītʹfo͝ol-nĕs
• Hyphenation: light‧ful‧ness

lightfulness (uncountable)

1. (rare) The quality of being lightful.

• brightness, luminousness

• William Dwight Whitney and Benjamin E[li] Smith, editors (1914), “lightfulness”, in The Century Dictionary: An Encyclopedic Lexicon of the English Language, revised edition, volumes III (Hoop–O), New York, N.Y.: The Century Co., →OCLC.