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A field study of fluorescent and LED classroom lighting

Gentile, Niko LU ; Govén, Tommy and Laike, Thorbjörn LU (2016) In Lighting Research and Technology
Abstract
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... (More)
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, 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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
subjective lighting comfort, perceived lighting, solid state lighting, LED, ambient lighting, circadian rhythm, Lighting efficiency, parasitic losses
in
Lighting Research and Technology
pages
20 pages
publisher
SAGE Publications Inc.
ISSN
1477-1535
DOI
10.1177/1477153516675911
language
English
LU publication?
yes
id
fd01d0d0-0b80-4c8c-b2fc-69767b55c86c
date added to LUP
2016-10-12 15:57:26
date last changed
2017-03-27 07:08:42
@article{fd01d0d0-0b80-4c8c-b2fc-69767b55c86c,
  abstract     = {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, 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.},
  articleno    = {1},
  author       = {Gentile, Niko and Govén, Tommy and Laike, Thorbjörn},
  issn         = {1477-1535},
  keyword      = {subjective lighting comfort,perceived lighting,solid state lighting,LED,ambient lighting,circadian rhythm,Lighting efficiency,parasitic losses},
  language     = {eng},
  month        = {10},
  pages        = {20},
  publisher    = {SAGE Publications Inc.},
  series       = {Lighting Research and Technology},
  title        = {A field study of fluorescent and LED classroom lighting},
  url          = {http://dx.doi.org/10.1177/1477153516675911},
  year         = {2016},
}