Philips Wake-up Light HF3531/01
Wake up light, 20 light settings, FM radio, snooze function, 7 sounds, midnight light
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. Sunset simulation is a light therapy used before you go to sleep. Sunset simulation prepares your body to fall asleep by gradually decreasing light to your set duration.