Light & Its Affect on Sleep 07/06/2017 Seishiro Hokazono, LAC, Samaritan Heartspring Wellness Center, explains how different colors of light, particularly blue and amber, can impact your ability to sleep. (45 seconds) To learn more about preparing for sleep and understand how digestion plays a role, see additional video excerpts from Seishiro Hokazono’s acupressure presentation. Play Video