After six hours of speculation, deals, and trades, the night looked to be over for the Tampa Bay Lightning on the first day of free agency on Wednesday. Then, literally at the twelfth hour, as the clock neared midnight and many fans had gone to bed, the Bolts secured one last move: Signing veteran defenseman John Carlson to a two-year, $17 million deal. A deal that can be the difference as the team looks for a deep playoff run next season.