Wake with light alarm clock set the alarm and the light will gradually turn on from complete darkness slowly to a very bright light in your bedroom. The light simulates the sun coming up and can compensate for the dark mornings in the winter. I have had this clock for a few years it's very robust and works well. You can find instructions of how to operate this cook light alarm clock online. The light can be set in graduations by pressing the button and you can leave it very dim or you can leave it very bright and it will stay at the set strength of light.