There is the possibility the light has the hot wire coming to it directly from a junction box and the switch just completes the circuit.
Can you change a light fixture with just the switch off.
Turn off the power.
Before replacing a light fixture check your electrical circuit panel to locate the circuit breaker control for the room where you ll be working.
The first is the room s light fixture is on a separate circuit with other lighting fixtures.
Find the right circuit to power down and if you can t figure that out shut down the electricity to the whole home.
Remove the old fixture to begin remove the old light by unscrewing the canopy and removing the wire connectors.
Before starting any electrical project big or small be sure to turn off the switch inside and also turn the power off at the breaker box.
Place the wall switches for the fixtures in the off position.
Use a circuit tester to verify the power is off.
Switch the circuit off.
Determine whether your fixture uses line or low voltage.
Changing a light fixture.
In that case you can certainly still electrocute yourself with the light switch off.
Most light fixtures will work with standard dimmer switches including those with halogen and incandescent lamps.
Once the appropriate breaker is turned off flip the light switch on and off to make sure there s no power running to the light.
If you install line voltage track and rail lights with incandescent bulbs you can use dimmer switches to control their brightness.