Quite a smart suggestion. He even used this system for 7 years so I am sure it is quite effective. The whole point is that the first alarm should be so quiet that it will only wake you up if you’re in “light” sleep. The second alarm is the back up to make sure that you wake up in time :). Alarm clocks are bad. How to wake up and feel better. – [Vincent Cheung. Hat tips to Venki for the link!] Related resources: The Function of Sleep 90 Minutes Sleep Cycle Information List of Polyphasic Sleep The Sleeping Reference