You rarely see more than a few people holding up lighters at concerts anymore, and holding up your phone (even if you have a Zippo app) just isn't the same. Recently, however, Coldplay have begun handing out Xylobands at their concerts as a futuristic replacement.

These LED-illuminated wristbands are given away free to the entire audience before the show and then controlled and synchronized via radio-signal, turning the entire audience into a huge light show that one person can control or even pre-program, controlling the speed of flashing and the color.

Check out a video of the wristbands in action, originally posted on the company's official website:

In an interview, Xyloband inventor Jason Regler says he came up with the idea after listening to a lyric from the Coldplay song, "Fix You."

"In 2005, when Coldplay did the Glastonbury Festival. I remember I was going through a few down days and I saw them doing Fix You. And there was just a feeling of it bringing everyone together, as well as the line "lights will guide you home." That's when the idea of a wristband came to mind."

The entire concept was created with Coldplay in mind luckily the group was extremely receptive to the idea. The LED armbands were even incorporated into their new music video, "Charlie Brown."

After the concert is over fans can decide between handing the wristbands over to be recycled or holding on to them as a souvenirs. A recent Telegraph article covered the hilarious story of Coldplay fans who brought home the wristbands with hilarious results.

When the wristbands continued to glow some fans began to freak out:

Fans have reported that the bands, which have been given out for free to more than a million fans, have started flashing again of their own accord several days after the event.

One fan told the Telegraph, "My Xyloband woke me up in the middle of the night and it's still glowing."

Another joked, "Really weird, my dad's white Xyloband just started flashing again." A Belgian fan added: "Mine is alive! It started flickering about an hour ago."

The article goes on to quote Regler, who says, ""There's no mind control or tracking, they are just for fun."

He also points to his company's website for a helpful suggestion on how to turn off the wristbands: take out the batteries.