TAMPA -- Erik Karlsson had three assists and Mark Stone scored twice to help the Ottawa Senators to a 5-2 win against the Tampa Bay Lightning at Amalie Arena on Thursday.
Kyle Turris, Mike Hoffman and Chris Kelly also scored for the Senators (27-16-6). Mike Condon made 19 saves.
Tyler Johnson and Brayden Point scored for the Lightning (22-24-6), who are 1-4-2 in their past seven games. Andrei Vasilevskiy made 25 saves.
WATCH: All Senators vs. Lightning highlights
"We wanted to get back to our defensive game and we came in against a very offensive team and gave up 21 shots," Senators coach Guy Boucher said. "To me that was the main thing. We got offense on top of that and we wanted to play 60 minutes and we did so that makes me happy. And Erik was just unbelievable."
Stone's first goal came at 6:33 of the second period to tie the game 1-1. Zack Smith made a backhand pass to Stone in front of the net and he chipped the puck past Vasilevskiy.
Video: OTT@TBL: Stone tucks home Smith's nice backhand feed
Turris gave the Senators a 2-1 lead with a power-play goal at 11:03 of the second with a wrist shot that beat Vasilevskiy.
Hoffman added a second power-play goal that gave Ottawa a 3-1 lead at 2:53 of the third period off a one-timer from center point that got by Vasilevskiy on the glove side.
"We got the goals when we needed them to keep them from getting momentum," Hoffman said. "We responded well. It's always nice when you get a couple on the power play."
Point made it 3-2 when he redirected a shot from Brian Boyle that got by Condon at 7:46.
But Stone gave the Senators a 4-2 lead at 9:22 for his 18th goal of the season. Stone waited in the slot and redirected a slap shot from Karlsson that went wide of Vasilevskiy's save attempt.
"I think guys are starting to get chemistry with different people," Stone said. "At the start of the year no one could really find that chemistry with each other but we are learning ways to score. It's been a good stretch for us offensively."
Video: OTT@TBL: Condon slides over to stop Killorn
Kelly scored into an empty-net with 25 seconds remaining in his 800th NHL regular-season game.
Johnson scored his 16th goal to give the Lightning a 1-0 lead at 3:39 of the second period. Nikita Kucherov harassed Senators forward Curtis Lazar into a turnover in the zone and Kucherov found Johnson in the crease for the tip-in.
"Obviously we're frustrated right now and not happy with the results," Johnson said. "Early on we had some chances and they didn't go in and they had chances and they went in. I think we're started to try to do too much but we have to stick to our system."
The game was Senators coach Guy Boucher's first in Tampa since being fired by the Lightning on March 24, 2013. He coached Tampa Bay from 2010-13 and reached the Eastern Conference Final in 2011.
"Well, it was great to come back here, an organization that gave me a lot, me and my family," Boucher said. "It was a good day [Wednesday] for me personally. It was a good day [Thursday].
Video: OTT@TBL: Turris whips in wrister for power-play goal
Goal of the game
Stone scored his second goal off a redirection of a shot that would have likely went wide of the net. Vasilevskiy had no chance to stop it.
Video: OTT@TBL: Stone deflects Karlsson's shot short side
Save of the game
Condon made a mistake in his own zone but recovered quickly to stop a goal after the puck went off of Derick Brassard's skate in the crease.
Video: OTT@TBL: Condon gets back to net to avoid miscue
Unsung performance of the game
Senators defenseman Mark Borowiecki was credited with eight hits and two blocked shots on 17 shifts in 12:03 of ice time.
Highlight of the game
Hoffman scored through traffic and a screen by Stone that took away Vasilevskiy's sight line.
Video: OTT@TBL: Hoffman rips power-play goal through screen
They said it
"Right now, the League is so close that you need to try and keep separation with the other guys, especially with divisional teams. We want to be better against teams from [the Atlantic Division], so that's a good start from us." -- Senators coach Guy Boucher
"This group has never been through this before, so it's kind of uncharted territory for them. A lot of the guys in that room are used to winning a lot. It tests you a little bit and when things have gone so well for so long and now there's a little bit of a bump in the road" -- Lightning coach Jon Cooper
"If you accept losing than you're a loser." -- Lightning forward Brian Boyle
Need to know
Condon is 4-0-0 against the Lightning in his career. … It was the Lightning's first regulation loss to the Senators at home since a 7-3 loss on March 6, 2012.
Senators: At the Buffalo Sabres on Saturday (7 p.m. ET; SN, TVA Sports, MSG-B, NHL.TV)
Lightning: Host the Anaheim Ducks on Saturday (7 p.m. ET; SUN, PRIME, NHL.TV)
Video: Stone's two goal-game leads Sens to 5-2 win