WASHINGTON

Jon Cooper’s Tampa Bay Lightning won Game 4 of the Eastern Conference final despite going the equivalent of more than a period without a shot on goal.

They won despite falling behind about 4 1/2 minutes into the game.

They won despite being called for three penalties — one right after the other — late in the first period, allowing Alex Ovechkin and the rest of the Washington Capitals’ prolific power play to get all that time to operate.

And they did it, mainly, thanks to Andrei Vasilevskiy, who made 36 saves and kept things close until Alex Killorn scored the tiebreaker with about 8 minutes left, lifting Tampa Bay to a 4-2 victory over Washington on Thursday night, evening the series at two games apiece.

Now the Lightning will host Game 5 on Saturday night, with Game 6 back in Washington on Monday.

The road team has won every game in the series so far.

The Capitals might be thinking the very same thing. After all, they fell to 3- 5 in the nation’s capital this postseason, while they are 7-1 in away games.

On Thursday, they even got booed — yes, a smattering of jeers rang out in the team’s first conference final in 20 years — late in the first period after failing to convert any of the trio of manadvantage chances.

That stretch was part of a chunk of nearly 21 full minutes of game time — the last 10:41 of the first period, followed by the initial 10:11 of the second — during which Tampa Bay never putt a single official shot on net.

And so it was vital that Vasilevskiy played just like the Vezina Trophy finalist he is.

The go-ahead goal came thanks to a defensive breakdown, when Killorn was left pretty much alone and scored 6 seconds after a Tampa Bay power play expired, putting in a pass from Ondrej Palat.

“Tonight was so important,” Killorn said. “Going down 3-1 in a series is tremendously different from 2-2.”