L.J. Cryer scored 16 of his game-high 22 points before halftime as 15th-ranked Houston rode a stifling first-half defensive effort into a 62-42 victory over visiting Troy on Tuesday.The Cougars (6-3) extended their homecourt winning streak to 27 games, the longest active run in the nation. The sharpshooting Cryer was instrumental in helping Houston extend its dominance at home, drilling 6 of 7 3-point attempts en route to his fourth 20-point game of the season to pace an offense that otherwise labored throughout.The Cougars’ Emanuel Sharp added 14 points while Terrance Arceneaux chipped in nine. J’Wan Roberts paired six points with nine rebounds for the Cougars, who shot just 43.1 percent from the floor.Houston led 33-11 at the break, setting a school record for fewest points allowed in a first half.Troy (5-4) fared far worse in terms of shooting. Myles Rigsby, the Trojans’ leading scorer on the season at 14 points per game, was limited to three points in the game, on a trey with 7:24 to play.Thomas Dowd put up 10 points for Troy, and Tayton Conerway had nine. The Trojans shot 24 percent overall and missed 16 of 18 3-point tries.