I'm super late to the Friday Night Lights bandwagon, in fact I just finished the series finale last night. One of the main reasons I decided to start watching this series was the fact that Explosions In The Sky did some of the soundtrack. It's a great show, and if you haven't seen it then you probably are missing out.
Devil Town by Bright Eyes was a song that they played a few times and really captured the feeling of the show. Enjoy