Noun

(-)

All the electromagnetic radiation given off by the Sun, especially that in the visible spectrum that bathes the Earth.

* {{quote-magazine, date=2013-06-08, volume=407, issue=8839, page=55, magazine=(The Economist)

, title= Obama goes troll-hunting , passage=The solitary, lumbering trolls of Scandinavian mythology would sometimes be turned to stone by exposure to sunlight . Barack Obama is hoping that several measures announced on June 4th will have a similarly paralysing effect on their modern incarnation, the patent troll.}}

(figuratively, figuratively) Brightness, hope; a positive outlook.