Thanks Alain, please don’t touch anything, the colors of your tank are amazing by the way! It is a good sign if the lamp is quieter than the rest of the machinery Very few manufacturers actually provide noise information. Maybe @Oliver@DSunY has official figures?The lights are in my fishroom with all my other equipment (carx, pumps, skimmer, etc). It would be a bit complicated for me to stop everything or even remove a light to test its noise level. But, bringing my hear near one of them, they seems to be very quiet.