Kansas City, Mo. ? Sam Bradford was lights out. So was Arrowhead Stadium.

As for the Chiefs, well, the light still hasn’t come on this preseason.

Bradford led St. Louis to a pair of touchdowns on its first two series, Steven Jackson churned up the Kansas City defense, and the Rams rolled to a 14-10 preseason victory Friday night.

“That was one of the things I said last week I was really looking for our offense to do, just get into a rhythm and establish some longer scoring drives,” said Bradford, who started 8-of-8 for 76 yards with two TD passes. “To come out and do that on the opening two series was really nice to see.”

Especially since it was downright hard to see.

Two banks of lights went out at Arrowhead Stadium in the first half, although there was just enough daylight that the teams managed to keep playing. Backup generators at the stadium kicked in and the lights came back on, but the Chiefs never found a jolt of electricity to get them going.

Quarterback Matt Cassel was 6-of-13 for 59 yards and was sacked for an 11-yard loss, while their top-ranked rushing attack produced just 14 yards on six first-half attempts. Jamaal Charles and Thomas Jones, who combined for 2,363 yards rushing in 2010, each carried twice for eight total yards.

Jackson had that much after his first carry.

He finished with 15 carries for 72 yards, including a 25-yard scamper on the opening play of the game. The three-time Pro Bowl running back, who managed only 10 yards on six attempts last week against Tennessee, played the entire first half along with the rest of the Rams’ starters.

“We definitely wanted to come out and set the tone for the game, get into a rhythm for the offense, especially the running game,” Jackson said. “We really wanted to get out and set a tone.”

They sure accomplished that.

The only highlight in the first half for the Chiefs was linebacker Derrick Johnson, who dropped several would-be interceptions a year ago. He leaped in front of Bradford’s misguided pass late in the first quarter and held on at the Rams 7. Kansas City wound up going a single yard — in the opposite direction — before settling for Ryan Succop’s 26-yard field goal.

As poorly as the Chiefs played, they still had a chance to win. They drove inside the Rams five with just over three minutes left, but three straight passes by backup quarterback Tyler Palko were broken up. Succop came on to attempt a field goal — which would have only made it 14-13 — to a round of boos from the sparse home crowd.

The kick was blocked.