Spontaneous ultra-weak photon emission from human hands varies diurnally

The present paper recorded spontaneous ultra weak photon emission of five subjects at palm and dorsal sides of both left and right hands in a 24 h period. Data demonstrate that intensity as well as left-right symmetry varies diurnally. Emission intensity is low during the day, rises during the evening and is high during the night. Time patterns for left and right hand are different. The left-right symmetry shifts in the evening. Data are explained within the concept of a regulatory role of the photon field in human physiology. However, other explanations cannot be excluded.