Every ceiling light fixture has a crossbar that's attached to an electrical box. The light fixture is then wired and attached the crossbar and box. Installing a new crossbar is a good idea for older homes with older crossbars or for heavy fixtures. Many older crossbars are made to hold up to 50 lbs. However, many electrical light fixtures can weigh double (or even triple) what older crossbars can hold. To ensure safety, install an all-purpose crossbar to keep your fixtures secure and looking great.
Turn off the room's main power from the circuit breaker to ensure safety.
Unscrew and remove the old fixture's canopy, using a flat-head screwdriver. This will give you access to the crossbar and electrical box.
Unscrew the crossbar from the electrical box, using the flat-head screwdriver. Now you can completely remove the old fixture.
Twist off any wires connecting the old fixture to the electrical box.
Screw the new crossbar into the electrical box, using the flat-head screwdriver.
Install your new light fixture as normal. Pull the new canopy up to the ceiling, making sure it's with the new crossbar. Adjust the pipe of the fixture. Screw in the lock nut and tighten it into the crossbar, using your hand. Once the lock nut is secure, add light bulbs to the fixture and turn the power back on.