Light and dark energy
Light and dark are also energy and when light decrease or stop, darkness replaces it and light change to other energies like warmth, color alteration and so on. Darkness similar to lightness contain different energies, for example; darkness produce heat, electricity, causes herbs and animals growing and killing, and those who benefit from dark better can gain power and potential. Mind of Persons who have black hair or use black hat, act better and mind of individuals who have not hair or have white hair act lesser and cannot dissolve problems and hardness properly, but those who exposes at absolute darkness their mind can work more and better. Human can benefit from darkness for tissues reinforcement. Each tissue and limb also can be powerful with dark medium and those who work in light give out their power more than high dark, so working at night dark is better for body. Darkness contain energy without light and flame, and it is better for body power increasing thus people who work in night and darkness may get tired lesser. Working in intense light causes body and mind tiredness and those who rest in dark better can get out of tiredness so mind can better work at night and darkness. Sensory limbs can work better in dark but eyes work with light better.