If your dimmer is buzzing, it likely doesn't have the correct load matched to it (This can happen when you switch over the LED bulbs with particularly older dimmers) or if it may just be that the dimmer isn't a great quality product.
It's not very often our dimmers don't work fantastically. We probably have a 95% success rate when we fit our dimmers, which gets the full range of dim that we know, love and share on our videos. Make sure your light fitting / bulbs are in fact dimmable, and we'll do the rest.
