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Title: Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office

Abstract

An installation in a Federal building tested the effectiveness of a highly-controlled, workstation-specific lighting retrofit. The study took place in an open-office area with 86 cubicles and low levels of daylight. Each cubicle was illuminated by a direct/indirectpendant luminaire with three 32 watt lamps, two dimmable DALI ballasts, and an occupancy sensor. A centralized control system programmed all three lamps to turn on and off according to occupancy on a workstation-by-workstation basis. Field measurements taken over the course of several monthsdemonstrated 40% lighting energy savings compared to a baseline without advanced controls that conforms to GSA's current retrofit standard. A photometric analysis found that the installation provided higher desktop light levels than the baseline, while an occupant survey found that occupants in general preferred the lighting system to thebaseline.Simple payback is fairly high; projects that can achieve lower installation costs and/or higher energy savings and those in which greenhouse gas reduction and occupant satisfaction are significant priorities provide the ideal setting for workstation-specific lighting retrofits.

Authors:
;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
Environmental Energy Technologies Division
OSTI Identifier:
986324
Report Number(s):
LBNL-3831E
TRN: US201017%%275
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
29; CONTROL SYSTEMS; GOVERNMENT BUILDINGS; GREENHOUSE GASES; LIGHT BULBS; LIGHTING SYSTEMS; OCCUPANTS

Citation Formats

Rubinstein, Francis, and Enscoe, Abby. Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office. United States: N. p., 2010. Web. doi:10.2172/986324.
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Rubinstein, Francis, & Enscoe, Abby. Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office. United States. doi:10.2172/986324.
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Rubinstein, Francis, and Enscoe, Abby. Mon . "Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office". United States. doi:10.2172/986324. https://www.osti.gov/servlets/purl/986324.
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@article{osti_986324,
title = {Achieving Energy Savings with Highly-Controlled Lighting in an Open-Plan Office},
author = {Rubinstein, Francis and Enscoe, Abby},
abstractNote = {An installation in a Federal building tested the effectiveness of a highly-controlled, workstation-specific lighting retrofit. The study took place in an open-office area with 86 cubicles and low levels of daylight. Each cubicle was illuminated by a direct/indirectpendant luminaire with three 32 watt lamps, two dimmable DALI ballasts, and an occupancy sensor. A centralized control system programmed all three lamps to turn on and off according to occupancy on a workstation-by-workstation basis. Field measurements taken over the course of several monthsdemonstrated 40% lighting energy savings compared to a baseline without advanced controls that conforms to GSA's current retrofit standard. A photometric analysis found that the installation provided higher desktop light levels than the baseline, while an occupant survey found that occupants in general preferred the lighting system to thebaseline.Simple payback is fairly high; projects that can achieve lower installation costs and/or higher energy savings and those in which greenhouse gas reduction and occupant satisfaction are significant priorities provide the ideal setting for workstation-specific lighting retrofits.},
doi = {10.2172/986324},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 19 00:00:00 EDT 2010},
month = {Mon Apr 19 00:00:00 EDT 2010}
}
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DOI:  10.2172/986324
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