Lyric discussion by ArcherAve 

This is actually somewhat of a sad song, it's about a guy who runs into a girl who broke his heart, and as they talk he finds out how bad her life has gotten. She is in a loveless and judging from the lyrics of the last verse possibly abusive relationship. And he's upset by this cause he thinks she deserves better and wants to help, but she won't let him.

@ArcherAve Pretty much nailed it. I think "put out the big light" is self-referential to the guy, hurt by seeing the abuse she's taken and what could have been

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