More than two million teenagers have attended in the last 15 years, said Mr. Luce, a 45-year-old, mop-headed father of three with a master’s degree from the Graduate School of Business Administration at Harvard and the star power of an aging rock guitarist.

“That’s more than Paul McCartney has pulled in,” Mr. Luce asserted, before bounding onstage for the opening pyrotechnics and a prayer.

For the next two days, the teenagers in the arena pogoed to Christian bands, pledged to lead their friends to Christ and sang an anthem with the chorus, “We won’t be silent.” Hundreds streamed down the aisles for the altar call and knelt in front of the stage, some weeping openly as they prayed to give their lives to God.

The next morning, Mr. Luce led the crowd in an exercise in which they wrote on scraps of paper all the negative cultural influences, brand names, products and television shows that they planned to excise from their lives. Again they streamed down the aisles, this time to throw away the “cultural garbage.”

Trash cans filled with folded pieces of paper on which the teenagers had scribbled things like Ryan Seacrest, Louis Vuitton, “Gilmore Girls,” “Days of Our Lives,” Iron Maiden, Harry Potter, “need for a boyfriend” and “my perfect teeth obsession.” One had written in tiny letters: “fornication.”

Some teenagers threw away cigarette lighters, brand-name sweatshirts, Mardi Gras beads and CD’s — one titled “I’m a Hustla.”

“Lord Jesus,” Mr. Luce prayed into the microphone as the teenagers dropped their notes into the trash, “I strip off the identity of the world, and this morning I clothe myself with Christ, with his lifestyle. That’s what I want to be known for.”