I confirm the words of "Guillaume 'about these LED bulbs: two that I just got work (for now), but their electronics (integrated in the base of the bulb) emits a high frequency electronic audible hiss several meters. Unacceptable and immediate return to Amazon! Too bad because otherwise it distils the lighting is nice. I come back to the brand LED 10W Vision-EL sold by LED and Fluorescent (dedicated web site), but more expensive I use it for 1 year without worry.