We need to install a new mirror/shaver light in the holiday cottage. I was thinking of getting one of these from screwfix https://www.screwfix.com/p/solent-led-shaver-light-white-8w/6753t but the reviews are mixed - humming transformers that are always on. Is this normal or are there better brands out there where the transformer is only on when the light is on or the plug is inserted?