The medicinal effect of light must try every self, because you can not give advice. The List Price is certainly in recent days large fluctuations, sometimes in half-day rhythm, inferior. I have unfortunately only noticed when I had already bought expensive. These games I know from Amazon as not (30 variation!), So a star deduction. Returning and cheaper reappointment was too stupid ... Important to me was that the lamp is small and no battery has to I have to look after, or sometime this no longer works. The device is otherwise kept simple, the brightness can be adjusted by pressing the On / Off button in three stages - more is not! So, contrary to the current Amazon Description NO "signal light displays duration of treatment on (15-minute segments, from 15 to 45 minutes)", this famous phrase at the Comfort model 3430! Therefore, the second star deduction. The light is very homogeneous with the new lens. A bag for lamp and power supply would have been nice for the price.
