The answer to 'recessed lighting buzzing noise' is that a buzzing or humming sound coming from recessed lighting fixtures is often caused by a problem with the electrical components or the transformer. This can be due to a variety of issues, such as a faulty dimmer switch, a loose connection, or a problem with the transformer itself.
Buzzing noises can indicate that the electrical current is not flowing properly through the fixture, which can lead to further problems if not addressed. In some cases, the buzzing may be accompanied by flickering or dimming of the lights, which are additional symptoms of an underlying issue.