Philips HF3520/60 Wake-up light for a gentle wake-up. Inspired by nature’s sunrise, light gradually increases within 30 minutes from soft morning red through orange until your room is filled with bright yellow light. This process of changing an increasing light stimulates your body to wake up naturally. By the time light has filled the room your chosen natural sound completes the wake up experience, leaving you ready for the day ahead. At your set wake up time natural sound will play to complete the wake up experience and ensure you are awake. The selected sound gradually increases in volume to your selected level within one and a half minute. There are five natural sounds you can choose from: Bird Song, Birds in the forest, Zen Garden, Gentle piano and Seaside Sounds. The brightness of the display adjusts itself. If the bedroom is filled with light, the brightness increases to keep the display readable. When the bedroom is dark the brightness dims so it doesn’t light up your bedroom when you are trying to sleep. Slight tap anywhere on product sets the snooze mode. After 9 minutes the sound will gently start playing again. At this moment in time the Philips wake-up light is the only one scientifically proven to work. In order to make the Wake-up Light the best possible product it can be in genuinely waking you up naturally and energized we have done a lot of clinical research. This reseach was conducted by independent science facilities to study and prove the effects of the wake-up light on the overall wake up experience. This way we have proven, among other things, that the Philips Wake-up Light not only wakes you more naturally, but also more energized and that it improves your mood in the morning.