The Lightning have signed free agent left wing Sean Bergenheim to a one-year contract today, Vice President and GM Steve Yzerman announced. ?We are happy to add Sean to the Lightning roster today,? Yzerman said. ?He is a competitive left winger who is also a solid two-way player. We believe he is a good addition to our team.? Bergenheim has registered 40 goals, 80 points and 195 penalty minutes in 246 career NHL games, all with the Islanders. He has reached double digits in goals and points in each of the last three seasons. In 2009-10, Bergenheim led the Islanders in game-winning goals with two and tied for eighth on the team with 133 shots on goal.