Good advice above. You will most likely have to paint and perhaps do some ceiling repair. This is why you see so many ceiling medallions around light fixtures.
I have a home built in 2006, the main panel does not seem to have a main breaker...? See attached pic of the main panel. It's a Siemens G3040 200 amp panel. Outs...
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It uses the same electrical box, just take down old one and hang new one. Follow safe practices for electricity.
When you buy the lamp it should have a small metal bar that screws across the electrical box and then a small screw in post..... https://www.youtube.com/watch?v=9PUCo2aXVAU&t=182s
You might want to get a pack of electric wire covers to join the lamp wire to the ceiling wires.
Don't forget to turn of the power at the breaker box, and test the wires.
Good advice above. You will most likely have to paint and perhaps do some ceiling repair. This is why you see so many ceiling medallions around light fixtures.