A field study of fluorescent and LED classroom lighting

Summary, in English

Indoor lighting is facing a massive retrofit to LED lighting. Research is needed to assess whether LED-based lighting can promote energy efficiency, boost visual comfort and support biological functions. This field study considered the lighting of four identical classrooms in an upper secondary school in Helsingborg, Sweden. Two classrooms were fitted with state-of-the-art ceiling pendants containing T5 fluorescent tubes and that had a direct/indirect light distribution (the control rooms). The other two classrooms were fitted with an experimental LED indirect lighting system (the experimental rooms). In the classrooms, 72 students aged 17–18 years performed their usual educational activities over a whole academic year. The light environment, electricity consumption, and students’ mood, light perception and saliva cortisol concentration were monitored. The two lighting systems produced only marginal differences. Overall, the experimental rooms were slightly preferred but achieved only small energy savings due to high parasitic losses.

• Författare: N. Gentile; Tommy Goven; Thorbjörn Laike; Klas Sjoberg
• Avdelning/ar: Institutionen för arkitektur och byggd miljö; Avdelningen för Energi och byggnadsdesign; Miljöpsykologi; Gastroenterologi
• Publiceringsår: 2018-06-01
• Språk: Engelska
• Sidor: 631-653
• Publikation/Tidskrift/Serie: Lighting Research and Technology
• Volym: 50
• Issue: 4
• Länkar: http://dx.doi.org/10.1177/1477153516675911
• Dokumenttyp: Artikel i tidskrift
• Förlag: SAGE Publications
• Ämne: Architectural Engineering; Applied Psychology
• Nyckelord: subjective lighting comfort; perceived lighting; solid state lighting; LED; ambient lighting; circadian rhythm; Lighting efficiency; parasitic losses
• Status: Published
• Projekt: Energy efficient and study promoting lighting in high school
• Forskningsgrupp: Environmental Psychology; Gastroenterology
• ISBN/ISSN/Övrigt: ISSN: 1477-1535