The Body Clock Starter 30 Lichtwecker simulates a 30-minute sunrise, the sun's rays generated thereby are a nice visual effect. I was genuinely surprised that the light usually sufficient to wake me up. On the days on which light was insufficient, was of a gentle awakening but unfortunately no question. The alarm is a thick minus point for non-hearing impaired. I have never heard such a penetrating annoying sound! Unfortunately, the alarm can not be changed. So if you do not want to rely solely on the awakening of the light itself, must either accept the nasty alarm or have recourse to an additional alarm. Here offer other Lichtwecker (from Lumie or Philips) clearly better alternatives, such. As the Waking up to music or nature sounds.
The handling is not quite intuitive, from time to time but you have to look up in the manual. Mir is the screen too light, with active alarm, it disappears by itself, besides you can also switch off manually, but not dim.
The light alarm clock has a sunset simulation, which will enable better sleep - I personally do not like it, for our little girl who does not want to sleep in the dark, but this is ideal. You can use the alarm as a bedside lamp.
Lumie used for the alarm clock an ordinary light bulb, while offering the advantage that the bulb can be replaced as needed, but the power consumption is also significantly higher than that of an LED.