The light source in your Wake-up Light is a unique arrangement of high-power LEDs (Light Emitting Diodes) designed to mimic the colors of a natural sunrise from deep morning red to bright daylight and give you the optimal wake-up improvement. Because of the long lifetime of LEDs, the light source in this device is not replaceable.
The high-power LEDs make your Wake-up Light very energy-efficient: the maximum power consumption of this appliance is 18W (when the light is turned on at maximum intensity, the sound is playing at maximum volume, and an iPhone is charging).
The display of your Wake-up Light is equipped with a light sensor that adjusts the brightness of the clock depending on the light level in your room. When your iPhone is docked you can choose between 4 brightness levels. If you are very sensitive to light at night, you can choose level 1. If you want a brighter clock at night, you can choose level 2 to 4. All levels go to the brightest setting when your bedroom is well-lit.