These downlights were exactly what I was after. They came with the AU plug attached and all four of the lights in my order worked out of the box. Alexa found them as soon as I turned them on. No app needed. The only complaint is that I ordered the 15W lights and they are not quite as bright as I had hoped. I was planning on using them at less than full brightness most of the time, but I think I will be leaving them on full for a bright effect.
Fun thing to try... get three, set one to red, one to green and one to blue to cook white light from its ingredients.