Was very excited about the arrival of this item. However have found the description to be misleading. I was expecting to be worken up by bright sunny day light 'simulating natural light'. In reality the item failed to wake me up at all, and the light it gives off even on full power was the colour and brightness of a solar powered garden light, cold, dim and blue. In a darkened room, it gave barely enough light to just make out objects. Infact a bedside lamp with a standard 40W bulb gave out far more light than the SAD clock. You would have to be starring directly at it from very close to sense the illusion of bright light, which is what you have to do when you set it which is fairly uncomfortable on the eyes.