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How to paint light fixtures
Turn off electricity prior to beginning any work on the light fixture.
You can do this by switching off not just the light itself, but by turning off the breaker. This ensures that you will not be electrocuted in the process of your fixture remodel.
Paint your fixture outdoors to allow proper ventilation. Not only does open air assist in minimizing any potential chemical fumes you may breathe in from the paint, it also helps control a potential mess inside the home from damaging floors and the surrounding work area.