As people increasingly work in indoor environments, the need to provide natural lighting is becoming more widely recognized. Recent modelling standards such as LM-83 require the use of climate-based metrics based on daylight coefficients, rather than illuminance-based metrics that simulate single points in time. While calculations based on daylight coefficients are fast, computation of the dayl...

In China, existing buildings comprise more than 40 billion square meters, most being of high energy consumption. A substantial reduction in electrical energy costs could be obtained through greater use of daylight. Daylight varies widely due to the movement of sun, changing seasons and diverse weather conditions. Custom static daylight assessments, simulations represent only one time of the yea...

The research presented in this paper reports an analysis of daylight in three offices with different exposures and characteristics located in Naples (Italy). The goal was to fully investigate daylight characteristics, also considering the circadian impact of daylight entering these offices, with the hope to develop guidelines to better assess daylight quality in built environments. One of the m...

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BACKGROUND It has been suggested that year-round daylight saving would reduce road traffic injuries. METHODS and results Using 15 years of police data from north-east England, we estimate that 6.9 (95 per cent CI 1.5-12.6) fewer serious or fatal road traffic injuries to child pedestrians would have occurred in this area over this period had year-round daylight saving operated (equivalent to 0...