Philippians 2:15 says believers shine as what in a crooked and perverse generation?

Answer: Lights in the world

Doing everything without complaining, believers are children of God without fault, shining as lights in the world.

“Do everything without complaining or arguing, so that you may be blameless and pure, children of God without fault in a crooked and perverse generation, in which you shine as lights in the world”— Philippians 2:14-15 (BSB)