Critics Consensus
Lanterns lights the way to a controlled and fantastical escape, in which Kyle Chandler and Aaron Pierre bring audiences into their world of wonder through fearless performances, grounded writing, and charismatic chemistry.

https://www.rottentomatoes.com/tv/lanterns/s01

Good.

It nice that DC is taking the Genre in a new direction. Less flash more substance.

They release TV series to reviewers ahead of time?

Yup, the term is "screeners" and it started in the film industry ages ago and in more recent years we've seen it for TV shows.

Sometimes it's just the first episode, sometimes it's just part of the season, and sometimes it's the whole season.

Usually for professional reviewers to review and build hype. Like in this case declaring the series "Fresh" might get more people to watch it.

less flash

I mean I hope someday more Flash.

That was to easy.

I should have done something that required a super human effort to make that joke.