When Ben Bishop, the goalie for the Tampa Bay Lightning, received his new mask last year, he had a thought. The mask had a splotch of glow-in-the-dark paint on it, about the size of a quarter. Bishop liked it. A lot. So he called David Gunnarsson, the NHL’s mask maestro, with a question.

“I asked if we could make the whole thing glow,” Bishop said. “That was the first one in the league like that.”

Painted...