While the study of biophotons is a relatively new field, research has suggested that these photons may play a role in communication within and between cells, as well as in the regulation of biological processes. It has been proposed that biophotons may be involved in cellular signaling, DNA repair, and immune system function, among other things. Some studies have also suggested that biophotons may be involved in the regulation of the body's circadian rhythm and sleep-wake cycle. For example, one study found that exposing human blood cells to a pulse of light resulted in an increase in biophoton emissions and a shift in the cells' circadian rhythm. While the exact role of biophotons in biological processes is still being studied, it is clear that light plays an important role in many aspects of human health and well-being, and biophotons may be a key mechanism through which light influences our biology.