[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100646850":3},{"organization":4,"armGroups":7,"interventions":19,"overallOfficials":18,"centralContacts":25,"locations":31,"responsibleParty":43,"collaborators":47,"id":50,"slug":51,"hasResults":52,"nctId":53,"briefTitle":54,"officialTitle":55,"acronym":56,"eligibilityCriteria":57,"healthyVolunteers":58,"sex":59,"minAge":60,"maxAge":18,"enrollmentInfo":61,"targetDuration":18,"studyType":64,"phases":65,"briefSummary":67,"conditions":68,"keywords":75,"overallStatus":33,"whyStopped":18,"lastUpdateSubmitDate":86,"lastUpdatePostDateStruct":87,"startDateStruct":90,"completionDateStruct":92,"leadSponsor":94,"locationsCount":95},{"fullName":5,"class":6},"The Hong Kong Polytechnic University","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"Morning Bright Light Therapy","EXPERIMENTAL","During this one-week condition, participants self-administer a 30-minute session of 10,000 lux bright light (melanopic equivalent daylight illuminance ≈ 8,989 lux) each morning, approximately 30 minutes after waking, using a standard light therapy lamp positioned per manufacturer guidance.",[13],"Device: Bright light therapy (10,000 lux light box)",{"label":15,"type":16,"description":17,"interventionNames":18},"Usual Light (Control)","NO_INTERVENTION","During this one-week condition, participants maintain their usual indoor lighting and morning routine without the light therapy lamp.",null,[20],{"type":21,"name":22,"description":23,"armGroupLabels":24,"otherNames":18},"DEVICE","Bright light therapy (10,000 lux light box)","Self-administered 30-minute session of 10,000 lux (photopic) bright light each morning, approximately 30 minutes after waking, for one week, using a standard 10,000-lux light therapy lamp positioned per manufacturer guidance. Stimulus characterized in melanopic units (melanopic equivalent daylight illuminance ≈ 8,989 lux).",[9],[26],{"name":27,"role":28,"phone":29,"phoneExt":18,"email":30},"Cehao Yu, PhD","CONTACT","+852 3400 3012","cehao.yu@polyu.edu.hk",[32],{"facility":5,"status":33,"city":34,"state":18,"zip":18,"country":35,"countryCode":36,"cosmosGeoPoint":37,"geoPoint":42,"contacts":18},"RECRUITING","Hung Hom","Hong Kong","HK",{"type":38,"coordinates":39},"Point",[40,41],114.18532,22.30715,{"lat":41,"lon":40},{"type":44,"investigatorFullName":45,"investigatorTitle":46,"investigatorAffiliation":5,"oldNameTitle":18,"oldOrganization":18},"PRINCIPAL_INVESTIGATOR","Dr YU Cehao","Research assistant professor",[48],{"name":49,"class":6},"Northumbria University","100646850","morning-bright-light-therapy-and-daytime-functioning-in-university-students-100646850",false,"NCT07685262","Morning Bright Light Therapy and Daytime Functioning in University Students","Effects of Morning Bright Light Therapy on Sleep, Alertness, Mood, and Cognition in Healthy University Students: A Randomized Crossover Trial","BLIGHT","Inclusion Criteria:\n\n* Enrolled university student\n* Aged 18 years or older\n* Generally healthy, with no diagnosed sleep disorder (sleep quality screened using the Pittsburgh Sleep Quality Index)\n* Residing in shared student housing\n\nExclusion Criteria:\n\n* Diagnosed insomnia or other diagnosed sleep disorder\n* Other medical, psychiatric, or neurological condition that could affect sleep, mood, or cognition",true,"ALL","18 Years",{"count":62,"type":63},153,"ESTIMATED","INTERVENTIONAL",[66],"NA","This study tests whether a week of morning bright light therapy changes how well healthy young adults sleep and how alert, positive, and mentally sharp they feel during the day.\n\nMorning light is the body's main signal for keeping its internal clock and sleep-wake timing on track. Many university students keep irregular hours and spend most of the day indoors, where light is far dimmer than daylight. This study asks whether adding a short, bright morning light session can help.\n\nEach participant takes part for two weeks. For one week they use a bright light box for 30 minutes each morning, shortly after waking; for the other week they keep their usual lighting. The order of the two weeks is decided at random, and each person serves as their own comparison.\n\nThroughout both weeks, sleep is tracked with a wrist-worn Fitbit and a short daily diary. Participants also rate their sleepiness and mood, complete brief computer-based attention and memory tasks, and take part in a short interview at the end about their experience.\n\nThe study compares the bright-light week with the usual-light week to see whether morning bright light improves sleep regularity and efficiency, reduces daytime sleepiness, lifts mood, or affects thinking performance. The trial is being conducted in waves; a first wave has completed and a second wave is planned, pending additional funding.",[69,70,71,72,73,74],"Sleep","Circadian Rhythm","Daytime Sleepiness","Mood","Cognition","Healthy Volunteers",[76,77,78,79,80,81,82,83,84,85],"Bright light therapy","Melanopic illuminance","Morning light exposure","Sleep regularity","Sleep efficiency","Daytime alertness","Crossover trial","University students","Wearable sleep tracking","Karolinska Sleepiness Scale","2026-06-29",{"date":88,"type":89},"2026-07-06","ACTUAL",{"date":91,"type":89},"2024-05-01",{"date":93,"type":63},"2028-06-30",{"name":5,"class":6},1]