philips proposed for several years dawn simulator models to wake up with the light and there they are clearly (and finally) get to a model without fault. Everything works fine. nikel light to wake up gently right setting, no whirring noises as parasites on other older models. EFFICIENCY level I recommend. The first few days the light will perhaps not be enough to wake you if you have experienced before the bell. But here you can also add sound effects to wake you if you are afraid that the light is not sufficient. And after a while actually, the light wakes you gently. It's really good.