Question for hugener and re.zumstein: Is it a buzzing or a whistling noise? The coloured ceiling lamps from Hue (Infuse, Xamento, Ensis, Surimu) have a very high-pitched whistling sound (no longer audible to older people). Buzzing would be more of a low tone and is definitely not normal. I returned the Surimu and Xamento because of the whistling and now wanted to buy the Enrave as I hope it doesn't whistle. Can you confirm that it doesn't whistle?