"I still want to prove to people and myself that I can play at this level," said Dalpe, who hadn't scored in the NHL since Oct. 20, 2016, for the Minnesota Wild. "So I guess getting the goals is the cherry on top. Now it's just waking up and trying to be that consistent player I've been searching to be my whole career."
Max Domi and Jack Roslovic each had a goal and an assist, and Joonas Korpisalo made 36 saves for the Blue Jackets (15-18-8), who won for the second time in nine games. Columbus is 3-1-1 against Tampa Bay this season.
Ross Colton and Luke Schenn scored, and Andrei Vasilevskiy made 26 saves for the Lightning (26-11-2), who have lost five of their past seven games and have scored two or fewer goals in four of their past five.
"We're where we are in the standings (third in the Discover Central Division) because we've played very well most of the year," Tampa Bay coach Jon Cooper said. "When the scoring dries up a little bit, you're looking for answers. The big thing is when that happens you can't change your game.
"That's a hard part for any athlete. Their heart is in the right place and they want to do the right thing, and then you start pressing it and maybe it takes you out of your structure a little bit."
Dalpe, who was playing his fourth game this season, made it 1-0 at 14:57 of the first period when he redirected a centering pass from Domi in the slot. It was the first goal the Blue Jackets scored in the first period since March 18 (10 games).
"[Dalpe] is an easy guy to pull for," Columbus coach John Tortorella said. "Taxi squad, not on the taxi squad, all that (stuff). It's been a long year for him."