How to wire a light fixture in a room?

To wire a light fixture in a room, first turn off the power to the circuit at the breaker box. Remove the old fixture and disconnect the wires. Connect the new fixture's wires to the corresponding wires in the ceiling, typically black to black, white to white, and green or bare to the ground wire. Secure the connections with wire nuts and mount the fixture. Turn the power back on and test the light.