ST. PETERSBURG, Florida (Reuters) - Dwayne Roloson delivered his fourth shutout since joining Tampa Bay on January 1 as the Lightning blanked the Philadelphia Flyers 4-0 Tuesday in a battle of the two top teams in the Eastern Conference.

The 41-year-old, who was acquired by Tampa Bay in a trade with the New York Islanders, has made a huge impact in just 11 starts for his new team.

"I'm fortunate enough to be making the best of an opportunity," Roloson told reporters. "They have a great core offensively and defensively and they're allowing me to see pucks. It's a lot of fun to play behind them, that's for sure."

Teddy Purcell scored twice in the first 90 seconds and Steve Downie made it 3-0 at 14:24 of the first period as the Lightning recorded their sixth successive win.

Steven Stamkos, the league's goals and points leader, netted his 39th goal of the season to cap the scoring as Tampa Bay beat Philadelphia for the third time in as many meetings this season.

The Lightning (32-15-5) extended their lead in the Southeast division to five points over the Washington Capitals, and closed the gap on Eastern Conference-leading Philadelphia (33-13-5) to two points.

Philadelphia goaltender Sergei Bobrovsky allowed three goals on six shots before being replaced by Brian Boucher.

The Flyers reached the Stanley Cup finals last season while Tampa Bay have missed the playoffs for the last three years.

"It's big coming off the break. We didn't know what to expect but we came out fresh," said Purcell. "We got off to a big lead and rode it the rest of game."

(Writing by Jahmal Corner in Los Angeles; Editing by Peter Rutherford)