Light therapy (typically blue or green light) is used to suppress melatonin (a hormone that signals the body to prepare for sleep). Taken at appropriate times, light therapy can be used as an aid to resynchronise the body's internal clock (Circadian Rhythm). This can improve energy levels and boost mood and is typically used in people with circadian rhythm disorders (sleep phase delayed or phase advanced).

The timing to amood and the light will be dependent on the type of underling disorder. It can also be used as an aid for people who frequently travel across time zones, or who do shift work. Incorrectly administering light therapy can have adverse effects, and Place of Dreams only conducts light therapy trials under physician supervision and prescription.