Short Sleeper

I sleep for about 4 or 5 hours a day. I go to bed after 10 and get up around 3. Do I get up too early? Indeed I sometimes feel sleepy during day, but I am so free to sleep anytime that there are no problems. I now have more free time than before and I feel happy. After working I may have to change this routine, but I don't forget that good living comes from my small awareness.