Reprinted with permission.

The use of artificial lighting in the office buildi ngs has significant contribution on total energy consumption of the building. With the increase in t he price of energy and public becoming more energyconscious,moreattentionhasbeengiven to theenergyefficient lighting.On theotherhand, with increased trend to go for efficient lighting s ystems, the quality of lighting has to bemaintaine d. Efficientlightingandqualitylightingarenotcon tradictorytoeachotherandthebetterunderstandi ngof thesetwotermswouldbehelpfultopromotetheimp rovementoftheenergyefficiency. The present paper first gives an overview of the di fferent factors related to the quality of lighting in officeenvironment.Different studiesabout theocc upant’spreferenceon light level, lightdistributi on, colour,andotherqualityaspectshavebeensummari zed.Theeffectofefficiencymeasuresonlighting qualityiswelldiscussed.Useofoccupancysensors,applicationofdaylightanddimmingaccordingto daylightaresomeof thepromisingenergysaving te chniques.The resultof theenergyconsumption measurementcarriedout inoffice roomswithdiffer ent lightingcontrolsystemsand theircomparison showsthatsignificantimprovementinefficiencyca nbemadewithoutcompromisingonquality