I had several of these at home and they worked great. I bought them from a big warehouse a few years ago but they have since switched to another brand. I've tried the ones they are offering now and they worked right away when I turned on the switch, even with no load. And yes, I know how to connect them properly. In total I have about 8 at home that I have installed. I returned the ones from the big warehouse and bought these. zero problems. Works perfect.