It was the sixth straight home win for the Lightning, who have dropped only one home contest all season.
Lecavalier ran his goal total for the year to eight, scoring on a backhander midway through the first period and putting one into an empty net with 4:11 to play in the third.
The second Lecavalier goal gave the Lightning a 4-0 lead and Roloson lost his shutout when Tyler Kennedy scored on a slap shot with 3:11 remaining.
Brett Connolly and Steve Downie also scored for Tampa Bay.
Roloson made 33 saves. Pittsburgh's Marc-Andre Fleury gave up three goals on only 17 shots.