The Tampa Bay Lightning don’t want to get ahead of themselves in their bid to become the first team in 40 years to win three consecutive Stanley Cup titles. The two-time defending champions are up 2-0 on the Presidents Trophy-winning Florida Panthers in the Eastern Conference semifinals yet understand there’s still a lot of work to do as they pursue a special place in NHL history. The Lightning have won four straight games to move from the brink of elimination in the first round to having an opportunity to take a commanding series lead when they host Game 3 in Tampa, Florida, on Sunday (1:30 p.m. EDT, TNT).