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Occupant Comfort Relating to Lighting Strategies



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ABSTRACT Title Occupant Comfort Relating to Lighting Strategies in the VeriFone Worldwide Distribution Center Building Name VeriFone Worldwide Distribution Center Costa Mesa CA Author Swapna Sundaram University of California Los Angeles Synopsis The VeriFone Center near Los Angeles is designed for maximum daylighting from clerestory windows and diffusing skylights These are integrated with fluorescent energy efficient lighting fixtures controlled by occupancy sensors and photosensors The open office area the specific subject of analysis is illuminated by direct indirect fluorescent fixtures with daylighting provided by a deep spine clerestory To determine illuminance levels the study used an illuminance meter two Hobo Light Intensity loggers and a camera Occupant visual comfort was determined by the use of a questionnaire Findings Some of the occupants complain of glare in the mid morning or midafternoon depending on whether they sit facing the east or west Sun angle diagrams drawn for those times through a cross section of the office space confirmed the entry of direct beam radiation onto workstations in the spring and summer The illuminance levels are not constant across the space The maintained peak level of 40fc was recorded only for office carrels enjoying both artificial light and natural clerestory light The carrels at the far end record much lower peaks of around 25fc Other than these findings the building is extremely pleasant visually with an overall highly positive reaction from the occupants If the above problems are addressed sensitively the building could stand as a model of successful lighting strategies and occupant visual comfort in a predominantly industrial setup TABLE OF CONTENTS I INTRODUCTION II PERFORMANCE III TOPICS AND HYPOTHESIS POSTULATION METHODS IV RESULTS V CONCLUSIONS APPENDIX I CASE STUDY DOSSIER FORM APPENDIX II SAMPLE SURVEY QUESTIONNAIRE I INTRODUCTION Occupant Comfort Relating to Lighting Strategies in the VeriFone Worldwide



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