O059 Exploring Environmental Light Exposure in Children: A novel pilot spectrometer study

Abstract Introduction Light plays an important role in the timing of children’s circadian system. Artificial manipulation of the timing, intensity, spectra, and duration of light exposure has increased, but with little consideration of the impact on children’s development, health, and wellbeing. Children are exposed to brighter nights, darker days, and less natural light environments than prior generations. Exploring the 24-hour light environment is a critical first step in understanding how light affects children. Methods We conducted a pilot feasibility and acceptability study. The study is of children aged 5 – 8 years. Children wore a miniature spectrometer and an actigraph for 48-hours. During this period, their parents completed a survey and daily time-use diary. At the end of the study, children undergo a short evaluation interview, as this is a new form of wearable not previously used with children. This study examines the feasibility and potential utility of this form of measurement. Results 5 children have been recruited into the study (3 boys, 2 girls). Initial feasibility testing with children supports high acceptability and adherence to the study protocol. This presentation will focus on both the technology development aspects, useability and feasibility in children, and preliminary results. Discussion This study presents preliminary data that supports the feasibility of novel light exposure metrics. Understanding the impact of increased use of digital devices by children, and increased control and manipulation of their light environments, requires new measures and protocols. These tools will help improve understanding of the effects of light on children’s sleep.