The Bolts couldn't make a two-goal third period lead hold up as they fell in overtime to the Capitals 4-3 at Capital One Arena on Friday evening.
Dmitry Orlov scored the game-winning goal three minutes into the overtime period to send the Lightning to their second-straight loss.
Despite heavy pressure from the Capitals for most of the opening period, the Lightning were first on the board. On the Bolts' second power play of the period, Brayden Point settled into a soft spot in coverage in the top of the slot and scored on a one-timer off a feed from Nikita Kucherov.
After being outshot 14-7 in the first period, the Bolts' play drastically improved in the second frame.
Mikhail Sergachev doubled Tampa Bay's lead early in the period with his 3rd goal of the year. Sergachev took a give-and-go feed from Kucherov and fired a shot that just trickled through Brayden Holtby's equipment.
Evgeny Kuznetsov got the Caps back within one less than a minute later but Tampa Bay re-established a two-goal lead on a late goal from Alex Killorn.
Video: TBL@WSH: Killorn buries shot from face-off dot
A pair of third period goals from Jakub Vrana and Alex Ovechkin, however, sent the game to overtime tied at three. Vrana scored early in the third period to pull Washington back within one and Ovechkin fired home a one-timer on a power play to tie the game midway through the period.
In overtime, Orlov capped a stretch of heavy pressure from the Capitals with the game-winning goal.
Tampa Bay collected a meaningful point that pulls them within one of the third spot in the Atlantic Division.
The Bolts are back in action at home on Saturday night to host the Hurricanes.
TBL | 18:50 Brayden Point (9) - Nikita Kucherov, Victor Hedman - PPG
TBL | 4:28 Mikhail Sergachev (3) - Nikita Kucherov, Kevin Shattenkirk
WSH | 5:17 Evgeny Kuznetsov (11) - T.J. Oshie, Jakub Vrana - PPG
TBL | 18:48 Alex Killorn (6) - Brayden Point, Nikita Kucherov
WSH | 3:45 Jakub Vrana (12) - T.J. Oshie
WSH | 11:36 Alex Ovechkin (17) - Dmitry Orlov, Travis Boyd - PPG
WSH | 3:03 Dmitry Orlov (2) - Evgeny Kuznetsov, T.J. Oshie