At first I fooled around with kits of ELV, then tasted cheap goods, everything is not so great, although I really wanted to substituting it just my existing impulse switches with dimmers, without somewhere to install a rotary control in the supply to the lamp. Eventually I then installed one of these times Eltakos and was amazed at how well the works and most importantly, what that can do everything (children's room function etc.). That it can also newer Lampengenarationen incl. Dimmable LED, an effect to which I did not think the purchase, the manufacturer was already here but perfectly prepared the had. Installation is simple (but should a layman let the rather make the electrician, given the simplicity of the story is not expensive). The various settings of the switching behavior was neither forgotten as the Soft-On and -Off function that protects the lamps and so gives it a significantly longer service life.