A Pilot of a Personalized Circadian mHealth to Improve Sleep in Night Shift Workers

Inclusion Criteria: * Inadequate sleep duration (habitual sleep less than 7 hours during the day) * Willingness to download the SHIFT app and follow the lighting recommendations * Ability to follow a set sleep schedule of 7 hours in bed after the night shifts * Working at least 4 night shifts a month * Shifts that must begin between 18:00 and 02:00 and last 8 to 12 hours * Score of 8 or above on the Epworth Sleepiness scale and/or a score of 8 or above on the Insomnia Severity Index Exclusion Criteria: * Other independent sleep disorders (e.g., obstructive sleep apnea, narcolepsy, etc.) * History of seizures or other significant neurological disorders * Bipolar disorder * Termination of shift schedule * Pregnancy * Current use of medications that impact sleep-wake functioning * Alcohol and substance use disorder