A New method of deriving illuminance recommendations for VDT offices

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ConferenceIESNA Conference Proceedings: 30 July 2000, Washington, D.C.
Pages211217; # of pages: 7
AbstractThis paper suggests a new method of objectively deriving illuminance recommendations for VDT offices. An experiment in a mock-up office space gave occupants control over dimmable lighting circuits after a day working under constant, pseudo-random lighting conditions (for example, desktop illuminance during the day varied between 100 to 700 lux). Data analysis indicated that the lighting experienced during the day influenced the changes in lighting made at the end of the day. Many occupants chose to reduce screen glare if any existed. Even after statistically removing the effect of glare, those exposed to lower illuminances during the day chose higher illuminances at the end of the day, and those exposed to higher illuminances during the day chose lower illuminances. Regression of these end-of-day preferences relative to the illuminance experienced during the day can yield a preferred illuminance, equivalent to the daytime illuminance at which no change was preferred at day's end. Using this method, preferred illuminances in the range 200 to 500 lx were derived. Further, the deviation between participants' lighting preferences and the lighting they experienced during the day was a significant predictor of participant mood and satisfaction.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number38729
NPARC number20331195
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Record identifier24032aa5-9235-48d7-a656-466c447b9454
Record created2012-07-18
Record modified2016-05-09
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