"When we're all playing with confidence and moving the puck around we're a dangerous power-play unit," Atkinson said. "One thing we've been harping on is … not being just like a one-and-done power play but being hard when you don't have the puck and trying to get the puck back. What makes the biggest difference is winning the draw."
Duchene scored on a rebound at 1:28 of the second period for his first Stanley Cup Playoff goal, making it 3-0.
"Obviously as an offensive guy, once one kind of bounces your way you're starting to feel good," Duchene said. "It's like you've got some adrenaline and your head clears a little bit more. Just one of those nights, I guess."
Sergachev made it 3-1 with a point shot that got through traffic in front at 5:00 of the third. The goal ended the Lightning's scoring drought at 87:09. Columbus, which trailed 3-0 in the first period of Game 1, scored the next seven goals in the series.
"If you asked us at the start of the series that this will be the result, obviously, we'd be pretty surprised," Tampa Bay defenseman Dan Girardi said. "But we have to give them some credit. They've been playing two hard games, two 60-minute games. It seems like when we do make a mistake, they're making us pay for it."
Riley Nash made it 4-1 at 9:06 of the third with a shot that beat Vasilevskiy top shelf. Panarin made it 5-1 at 12:15 with a one-timer off a backdoor pass from Duchene.
