lightness

/L AY1 T N AH0 S/
noun
  1. 1

    The condition of being illuminated

  2. 2

    The relative whiteness or transparency of a colour

  3. 3

    The product of being illuminated.

noun
  1. 1

    The state of having little weight, or little force.

  2. 2

    Agility of movement.

  3. 3

    Freedom from worry.

  4. 4

    Levity, frivolity; inconsistency.

Source: https://en.wiktionary.org/wiki/lightness