Their downfall was Tampa Bay's power play, which went 3-for-3 in the second period, including two goals and the game-winner from Nikita Kucherov, who leads the NHL with 119 points (37 goals, 82 assists).
"We're not going to go home and cry over this game," said Capitals forward Carl Hagelin, who had a goal and an assist. "I thought we played hard. We played well. I thought as a team we showed a lot of resilience. They got three goals on the [power play] and you can't, first of all, put them on it. I don't think the PK was terrible, but they don't need much."
The Lightning may have home-ice advantage already secured, but with five more wins they'd match the 1995-96 Detroit Red Wings' NHL record of 62, and they need 14 points (out of a maximum of 16) to equal the 1976-77 Montreal Canadiens' NHL record of 132 points.
That can serve as some motivation, but they're relying on games like this one to keep them playoff ready. They know nothing they do in regular season can erase what happened against the Capitals in the playoffs last season and insist these regular-season games are not about setting the tone if they each get to the conference final again.
"I think the tone was set last May," Lightning coach Jon Cooper said. "I know it's fun to play them. We know that they are an elite team in this league, but I don't think anybody is sitting here saying, 'Oh, this is a tone-setter.' There's so much that has to happen. Ultimately, we'd have to win two rounds and so would they to get back to that spot. We'd be taking a lot for granted just to say it's going to affect things in May.