The Fibaro Walli Dimmer is a small in-wall module combined with an aesthetically pleasing switch that can be used to dim existing lighting. Always adjust your lighting to suit the occasion. The Fibaro Walli Switch can be used with the following light sources: traditional incandescent and halogen bulbs, ELV halogen lamps and dimmable LED bulbs (with electronic transformers), LV halogen lamps (with ferromagnetic transformers), dimmable LED light sources, dimmable compact fluorescent lamps, and CFL tubes. In addition to the Fibaro Walli Dimmer, the Fibaro Bypass 2 is available. This is required to dim and switch LED lamps and energy-saving lights without flickering. Features: Compatible smart home products across manufacturers thanks to the Z-Wave protocol.