Friday Night Lights
Cast of Friday Night Lights on press tour

The cast of "Friday Night Lights" gathered to speak at the NBC Universal 2008 Summer Television Critics Association press tour in California.

Frederick M. Brown/Getty Images

A variety of fan-organized and media campaigns kept "Friday Night Lights" on the air when NBC wanted to cancel the show.

Fans pulled together through Facebook groups, online petitions and e-mail campaigns to show NBC that they supported "Friday Night Lights." In the spirit of "Roswell" and "Jericho," fans searched for a symbol that they could send to the network to show their support, so they sent light bulbs and eyedrops to NBC.

Light bulbs are pretty self-explanatory, but why eyedrops? The Clear Eyes-brand eyedrops were a reference to the team's motto on the show: "Clear eyes, full hearts, can't lose." The VH1 show "Best Week Ever" organized the light bulb campaign, while the eyedrops were a totally fan-driven gimmick.

Despite the show's low ratings, these fan-supported efforts kept "Friday Night Lights" on the air for five seasons before NBC announced its cancellation in 2010.