You have two strong saving throws. Fix that.

Your class abilities are out of order. You have a 2nd level feature before 1st level features. (Nitpicky, I know, but it's confusing.)

Solar Weapon should allow for two weapons, in case you want to TWF. Nevermind, this is a Sword and Board class.

+1 AC is fine, just so long as you can't get Defensive Fighting Style.

Twilight Paths have you gaining features at the wrong levels.

Illumination should be one skill or the other, not both.

Overall... Seems good. I didn't really take a close look at the spell list (I'm not a spell guy) but it seems cool. Nothing too radically new, but feels balanced and thematic.