West and Stephenson were among six Indiana players in double figures in the win, which got the Pacers back on track after losing two of their previous three games.
Indiana dominated the paint, outscoring the Lakers 52-32 under the basket and winning the rebounding contest 63-50.
The game was tied 49-49 at halftime, but the Pacers outscored the Lakers 30-20 in the third quarter and led 104-88 in the final minute of the contest when Roy Hibbert slammed home the last of the 11 points he scored in the game.
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