When the DJ announced a contest, the phones 'lit up'. [=the lights on the phones lit up because many people were calling]
His eyes/face 'lit up' [=he looked very happy and pleased] when she walked in the room.
He 'lit into' his employees for their sloppy work. [=he criticized them very harshly]
(..) Draw swords. Hold! Hold them! What? Amon Din. The beacon. The beacon of Amon Din is lit. Hope is kindled. The beacons of Minas Tirith! The beacons are lit! Gondor calls for aid. And Rohan will answer. (..)2003 The Lord of the Rings: The Return of the King
(..) Middle-earth uniting under one banner. He will raze Minas Tirith to the ground... ...before he sees a king return to the throne of Men. If the beacons of Gondor are lit, Rohan must be ready for war. Tell me... ...why should we ride to the aid of those who did not come to ours? (..)2003 The Lord of the Rings: The Return of the King