OKLAHOMA CITY — Andrew Bynum scored 16 points and Kobe Bryant had 14 as the Lakers held a narrow lead at halftime tonight at the Ford Center. The Lakers led by as many as 13 points in the first half. The Thunder led only once, at 41-40. The Lakers went on a 12-0 run after losing the lead, but Oklahoma City roared back before the break. Kevin Durant led the Thunder with 20 points on 6-for-10 shooting. Ron Artest checked Durant.