was in Canada a few years ago and got talking to a couple of guys in a bar (no it wasn't a bummers bar before people crack that gag) re ice hockey and football back home etc...

Not sure how much truth in it, maybe some US or Canadians can answer, but one of them said they had experimented with a luminous flashing puck one season so the viewers could see the puck ??

Apparently it didn't go down well with the players though and they stopped it ??