We take care of with the dimmer a heating plant and gave already bought the third. In principle, a great thing that has brought our tropical plants well over the winter. But we had of the three devices, unfortunately, also a return, since it had the mistake many times described. It simply could not turn down, but simply turned off at half position. The two other work but properly. It seems, unfortunately, to be a great Exemplarstreueung at the dimmer. Since, however, when times with a copy unlucky, the device can send back from Amazon without any problems, there is a (slightly) limited recommendation. The functioning copies can easily be controlled between 220V and 25V and make going to crash other problems. The price is great and the delivery was also made every time promptly.