Lightnes or Lightness: How To spell?
The word Lightnes is misspelled against Lightness, a noun meaning "Absence of depth or of duskiness in color; as, the lightness of a tint; lightness of complexion."
Lightness has double 'ss' in the end mispronounced as 's'Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  lightne-s  Correct Spelling:  lightne-ss 
Find more wrongly spelled words of Lightness to spell it well.