Abstract Lighting consumes about 20% to 40% of the total electricity use in large office
buildings in China. Commonly in building simulations, static time schedules for typical
weekdays, weekends and holidays are assumed to represent the dynamics of lighting
energy use in buildings. This approach does not address the stochastic nature of lighting
energy use, which can be influenced by occupant behavior in buildings. This study analyzes
the main characteristics of lighting energy use over various timescales, based on the …

Lighting consumes about 20 to 40% of total electricity use in large office buildings in the US
and China. In order to develop better lighting simulation models it is crucial to understand
the characteristics of lighting energy use. This paper analyzes the main characteristics of
lighting energy use over various time scales, based on the statistical analysis of measured
lighting energy use of 17 large office buildings in Beijing and Hong Kong. It was found that
the daily 24-hour variations of lighting energy use were mainly driven by the schedule of the …