Inspired by natural sunlight, the Philips Wake Up Light starts gradually lighting up over a 30 minute period to wake you in the most natural and relaxed way. It starts at low light and goes up to bright yellow light to stimulate your body to wake up naturally, it also beeps gently and increases in volume over 90 seconds to ensure that you don’t oversleep. And with 10 brightness settings, the light can also be used as a reading light or a nightlight.