I just recently purchased this light and have decided to go with the saxby preset off their website. In the evening I hear this noise and I suspected it to be the fan but it is fairly new and the fan is clean. It only happens during a certain time when the lights are going down and suspected to be some type of frequency interference. I have yet to put it in manual mode and dim each light to see what color channel may be causing it. I would love to get your ideas on it.