Comment by brightlancer

TNG was lit much like other action/adventure shows when it debuted in 1987, e.g. MacGyver, Magnum PI, Simon & Simon, The A-Team (which ended that spring) -- the Bridge and hallways were much brighter than even a sitcom, I'd bet as a specific aesthetic choice of The Future Is Bright.

When DS9 debuted a few years later, it was stepping into a cultural mindset that had embraced Dark And Gritty in broader entertainment. That series is still much brighter than many shows today, but that's because of a technological revolution (including costs) rather than a change of "TV as an art form rivaling movies".

Yes, there is a mindset within Hollywood circle(jerk)s that so-dark-I-cannot-see is "more sophisticated, serious, and artful", but viewers broadly think it is idiotic. (Also, 2-and-a-half or 3 hour movie runtimes.)