So is it some Edison anniversary? The theme is thick today, with lots of quote, name (without the oh-so-crosswordsy middle name), nickname, hidden light bulb shape, circled "Aha moment," and even a plus sign in the middle, signifying, at least to one, energy itself. That's a lot! And the fill didn't suffer too much. It was, however, somewhat less than an enthralling solve. That could, however, be somewhat due to the fact that Frannie and I solved this in the car, on the second day of a long road trip, after a night spent tossing and turning in a hotel. So, we were a little tired.
Is EOS (7A: Sister of Helios) part of the theme? because she represents the coming light of day? No, probably not.
I don't know, maybe I'm just out of sorts. Things I might normally think were clever, like 42A: Sticks in the closet? (MOPS), and 68A: Couple at the altar? (IDOS) (ok, that one might be a stretch even on a good day), I didn't think much of today. And what is LEDES (58D: Starts of news articles)? Why isn't it "leads?"
I'll say again, it's an impressive amount of fill. Let's leave it at that. It's not you, Ian, it's me. I need some sleep.