PhototherapyPhase II Study - Trial of a Phototherapy Light Device to Improve Sleep Health

Inclusion Criteria:

1. Between the ages of 18 and 60 years old
2. Able to read and write fluently in English
3. Access to a mobile device for video calls, online questionnaires, syncing devices, and communication with study staff
4. Access to a residential mailing address for shipping study materials
5. Exhibit a score of >8 on the Insomnia Severity Index
6. Self-report that they have a problem with their sleep that they wish to improve

Exclusion Criteria:

1. Have a moderate to severe current sleep disorder
2. Have a current psychiatric disorder
3. Are taking medication that would interfere with sleep, including beta blockers, antidepressants, antianxiety medications, hypnotics, or stimulants
4. Have a medical condition that would interfere with their ability to complete all study procedures or would render measurements invalid (e.g., some autoimmune conditions, cardiac conditions, endocrine conditions, or chronic pain conditions)
5. Exhibit a regular sleep schedule, where bed and wake times are kept within a 2-hour window 7 days per week
6. Exhibit a regular sleep schedule during the night, beginning no earlier than 9pm and ending no later than 10am
7. Have not engaged in shift work for the past month, and will refrain from shift work during the study
8. Are unable to restrict alcohol consumption to no more than 2 drinks within 4 hours of sleep
9. Are unable to restrict caffeine use to no coffee or caffeinated beverages after 12pm during the study
10. Regularly smoke or use other tobacco products
11. Regularly use cannabis-derived medicinal products
12. Are pregnant
13. Are a full-time caregiver to an individual that requires attending during the evening and night