The sun in a dream commonly represents clarity and vitality -- a sense that something confusing is finally coming into focus, or that your energy is returning after a depleted stretch. A blinding or overpowering sun can instead point to optimism that feels forced, pressure to appear fine when you aren't.
The Artist must know how to vary the planets significations according to the year wherein he writes, having still a regard to the grand Epoch of superior Conjunctions or Comets preceding. - William Lilly (1602.-1681.)