Noise depends on lamp (nfassung)

Have, inter alia, 3 of these LEDs ordered and seen hinsichtich the brightness at 10 / 11W nothing better.
Only the overall length are restrictions on some lights, so that when the shorter lamp Philips 11W had to be used (by the way, is also very good - bought at OBI).

This is noticed that with me at a hanging lamp (IKEA) an unpleasant hum has surfaced, the other two LEDs were without noise.
When replacing crosswise with another hanging lamp was then clearly understand that the noise is not related to the LED, but with the lamp (nfassung).
Have used in the previously humming a lamp Philips 11W and set the Müller-light to another location (both without noise).