Tampa Bay took a 2-1 lead on Kucherov's 4-on-3 power-play goal at 8:10 of the second. After defenseman Josh Manson blocked shots by Stamkos and Kucherov earlier in the power play, Stamkos faked a shot from the left circle before feeding Kucherov for a one-timer from the high slot that went through Perry's screen in front and past Kuemper on the stick side.
The Lightning were 1-for-16 on the power play in the series before that.
"I just knew if I maybe pump-faked, they would give a lane to make a play and, obviously, give it to 'Kuch' and he made no mistake," Stamkos said. "But it was a big moment in the game. You get a 4-on-3, you want to capitalize, and we can get some confidence off that as well."
Makar tied it 2-2 at 2:31 of the third when the rebound of his shot from the right circle deflected in off the skate of Lightning defenseman Erik Cernak in front. But Tampa Bay was undeterred by the unfortunate break.
"It went off our skate, and in the net," Perry said. "Bounces happen, but at the same time, you have to create your own bounces and it was only a couple minutes later or whatever it was where we found a way to put one in the back of the net."
The Lightning were patient moving the puck around in the Avalanche zone before Palat was able to slide back into open ice between the circles when Makar and Nichushkin chased after defenseman Victor Hedman at the bottom of the left circle. Hedman quickly fed Palat for his Lightning-best 11th goal of this postseason.
"I was just trying to get open and get lost a little bit, and I saw 'Heddy' and he sees me, so it was just easy shot for me," Palat said. "I'm just trying to one-time it, and lucky enough it went in."
NOTES: Palat scored the 12th game-winning playoff goal of his NHL career, adding to his Lightning record. Joe Pavelski of the Dallas Stars (14) and Evgeni Malkin of the Pittsburgh Penguins (13) are the only active players with more. … Avalanche forward Andre Burakovsky missed a third straight game since being hit in the hand with the puck in Game 2. … Lightning center Brayden Point missed a third straight game with a lower-body injury.