When King Solomon finished his prayer, fire came down from heaven and burned up the sacrifices that had been offered, and the dazzling light of the Lord's presence filled the Temple. 1
References for 2 Chronicles 7:1
Because the Temple was full of the dazzling light, the priests could not enter it.
When the people of Israel saw the fire fall from heaven and the light fill the Temple, they fell face downward on the pavement, worshiping God and praising him for his goodness and his eternal love. 2
References for 2 Chronicles 7:3
7.3 1 Ch 16.34; 2 Ch 5.13; Ezra 3.11; Ps 100.5; 106.1; 107.1; 118.1; 136.1; Jr 33.11.