Sleep Insufficiency

The goal of this clinical trial is to determine whether a combination of a novel lighting intervention and a behavioral intervention are able to increase total sleep time in adolescents. The main questions this trial aims to answer are whether this combination therapy is able to meaningfully increase total sleep time in adolescents, and do so over a sustained period of time, and whether such a changes is associated with concomitant changes in mood and cognitive performance.

The aim of the Move@NUS pilot study is to determine the feasibility of establishing a digital intervention cohort to monitor and improve the health and wellbeing of students by encouraging them to engage in healthy movement behaviours (i.e., physical activity, sleep, and limiting smartphone-based recreational screentime). The digital intervention cohort consists of: * 6-months of continuous monitoring of movement behaviours, wellbeing and related factors via an Apple Watch and repeated bursts of ecological momentary assessments (EMAs). * 3x embedded randomised controlled trials (RCTs) evaluating the efficacy of small-scale smartphone-based interventions designed to nudge participants toward participating in healthier movement behaviours.