The Golden Knights outshot the Lightning 41-19, including 17-5 in the first period.
"That was tough. I thought we had a solid second period. We just let it slip in the final two minutes," Theodore said. "We all know they're going to play hard, and we have to be a little more ready for that."
NOTES: The NHL moved up the holiday break to start Wednesday instead of Friday due to COVID-19 concerns. It is scheduled to end Sunday. ... Stamkos scored his 65th game-winning goal, passing Martin St. Louis for the most in Lightning history. … Vasilevskiy won his seventh straight game, one behind Carolina Hurricanes goalie Frederik Andersen for the longest streak this season. Andersen won eight in a row from Oct. 14-Nov. 3. … Bellemare, selected by the Golden Knights in the 2017 NHL Expansion Draft, has scored five goals in 11 games against his former team. … Golden Knights goalie Robin Lehner is day to day with a lower-body injury sustained Sunday against the Islanders. ... Vegas defenseman Nicolas Hague did not play because of an undisclosed injury. … William Karlsson played his 300th game with Vegas, the third player to reach that mark (Jonathan Marchessault, 307 games; Brayden McNabb, 301).