I learned to nap during the day as much as possible. Optimal seems to be having two naps for 25 min each. This gives me ability to restore my health much better. I feel that as I am awake, my stomach is inflated from the information I take in. As I nap, it is deflated and I feel much refreshed. I believe that my higher self uses these naps to exchange information an energy with me. This way we both benefit. I noticed that some classical Russian writers used naps. Also I came across a notion that a channeler Jane Roberts also discovered that naps are greatly helping her health. Naps allow me to shorten my night sleep and to saturate my day with more experiences, I increased my ability to take in experiences and to be more aware. Essential for my naps is the sense of protection. For most people naps are not possible since they are not protected. They are often at work during the wake time and there is close to impossible to nap. I am using noise blocking headphones and sleep mask to restrict my hearing and to block light. This helps much the perception of security. Humans need darkness to sleep and schedule of sleep cycles is essential for well-being. Take this into account in the colony. Scientists did interesting research of sleep cycles in absence of electromagnetic waves and other clues of timing. Volunteers lived for months underground and their cycles were studied. I believe that natural sleep cycle for humans was found to be 28 hours, longer than current 24 hour cycle of the Earth. I am not sure that this 28 hour result is true; there might have been a cultural confounding factor which biased the experiment. But looking at the timing of cycles would make sense when building the colony.