Inclusion Criteria:  Patients between the ages of 18-45 years clinically diagnosed with a Mild Traumatic Brain Injury (mTBI) diagnosed between 3 to 24 months from presentation complaining of sleep disturbance. Underwent a sleep study PSG. Documentation of a history of a qualifying mTBI within 3 to 24 months of traumatic incident and/or diagnosis with persistent symptomatology after 3 months. For reference, International Classification of Diseases, Tenth Revision (ICD-10) clinical criteria for Post Concussive Syndrome (PCS) require a history of mTBI and the presence of three or more of the following eight symptoms: 1) headache, 2) dizziness, 3) fatigue, 4) irritability, 5) insomnia, 6) concentration or 7) memory difficulty, and 8) intolerance of stress, emotion, or alcohol.  Exclusion Criteria:  Any positive cranial findings on imaging studies A diagnosis of or a family history of neuropsychiatric co-morbidity. Any additional diagnoses compounding the diagnosis of a mTBI. Currently undergoing Cognitive Behavioural Therapy. Currently taking any medication for the purpose of improving sleep including medical and recreational cannabis, barbiturates, benzodiazepines, antidepressants, antihistamines, melatonin or other natural supplements. Diagnosed with sleep apnea (obstructive or central) by polysomnography or requiring Continuous Positive Airway Pressure (CPAP) to relieve sleep apnea. Currently undergoing any alternative or complementary medical procedure, i.e. acupuncture, hypnosis, homeopathy, etc. Pregnancy Malignant growth in the neck and cranium Taking any photosensitizing medication.