Although the K4411 is presented as a universal dimmer, the Philips A67 12W E27 CL dimmable LED bulb flashes annoyingly throughout the control area, accentuating up to 40% of the intensity. Installation is simple, involving only a switch and a light bulb. I tried all the setting options. See https://www.assets.signify.com/is/content/Signify/Assets/philips-lighting/global/20210101-professional-led-mv-dimmer-list-q1.pdf, although I did not find the drive in the list K4411, I find that the only Bticino drive listed is not compatible with virtually any Philips dimmable LED bulb on the market. I specify that the replaced drive worked without problems, the replacement being made for reasons of unitary appearance. It would be useful to have a list of compatible bulbs on the BTicino website, so that it is not necessary to take a bulb for testing before any purchase of bulbs, or at least a disclaimer related to its non-universality.