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Daylighting Design
Considerations and services offered by IlluminArt
Sustainable Lighting Design
Human needs
Lighting techniques that support health, well being, visibility and productivity
Economic
manage initial equipment costs with specifications that reduce operations costs
Environmental
reduce carbon emissions, hazardous waste and controls outdoor light pollution
Aesthetic
light that improves interior and exterior design aesthetics.
The Lighting Quality Factor in Design
A new paradigm has developed in lighting that most architects must become aware of;
The QVE or Quality of the Visual Environment. It raises ‘the minimum standard of care’
required in the practice of lighting design. It is essential to bring this information to your
client, to discuss the many advantages that new lighting methods can offer. The following
pages illustrate information found in the IES QVE Chapter 10 of the lighting handbook.
Lighting is not about footcandles
Considerations that need to be
addressed early in the design process
with the owner as they have a big
impact on long term costs
Daylight harvesting
is the 1st consideration in high quality lighting
programs; new construction and renovations
Benefits of natural light
Issues to overcome
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Psychological / uplifting
Physiological / healthy
Energy reduction / daylight harvesting
‘there is nothing more efficient than ‘off’
and sunlight is a free resource!’
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an ‘old school’ design approach
the need for ‘fenestration fashion’
false beliefs based on past
experiences
1st cost drivers without looking at ROI
lack of owner awareness
its not ‘easy’ to do it right the 1st time
Summary examples of published, non-energy benefits of
natural light integration from recent independent research
complete studies and reports of these conclusions are available on line
Benefits of Natural Light
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Carnegie Mellon summarized findings
from 11 studies documenting the impact
of high performance lighting on
productivity. Their analysis found that
productivity gains ranged between
0.7% and 26.1% with an average
median value of 3.2%
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High performance schools with multiple
features including daylighting and better
electric lighting cost 1.65% more to build
($3.00 a square foot). These schools
were projected to save 33.4% on
energy, and create a variety of health,
learning and other benefits (valued at
$74 / sq ft over the life of the building).
Among twelve models considered in that
study were identified a central tendency
of a 21% improvement in student
learning rates from those in classrooms
with the least amount of daylight
compared to those with the most.
HESCHONG MAHONE GROUP, Inc.
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89 patients undergoing elective surgery
were used in a hospital study. Patients
were placed on either bright or the dim
side of the hospital units. Intensity of light
levels were measured daily. The patients
on the bright side of the rooms received
46% higher intensity daylight than the dim
side. Those patients perceived less
perceived stress, marginally less pain,
and 22% less analgesic medication per
hour, and had 21% less pain
medication costs. (Jeffrey Walsh,
University of Pittsburgh Medical Center.
Published in the Psychosomatic Medicine
Journal, 2005.)
Daylighting in retail
Daylighting benefits
In retail are huge
Reduced operations
cost / 5 year payback
And increased sales
see next slide
Photos borrowed from the
internet / thank you
Retail Lighting Research Summary
HESCHONG MAHONE GROUP, Inc.
www.h-m-g.com
‘Skylights were found to be positively and significantly correlated to
higher sales. All other things being equal, an average non-skylit
store in the chain would be likely to have 40% higher sales with the
addition of skylights, with a probable range somewhere between
31% to 49%. This was found with 99% statistical certainty. After
the number of hours open per week, the presence of skylights was
the best predictor of the sales per store of all the variables that we
considered. Thus, if a typical non-skylit store were averaging sales
of $2/sf, then its sales might be expected to increase to somewhere
between $2.61 to $2.98 with the addition of a skylighting system’.
Lighting Quality Case Studies
The new common denominator of successful lighting systems
web addresses for these research organizations are found on the last slide
HESCHONG MAHONE GROUP, Inc.
Lighting engineering and lighting quality must receive equal weight early in the design
process. Energy efficient lighting without regard for lighting quality will not meet current
recommended standards of practice
Daylighting design is a value added
Integration of architecture, daylight and electric lighting systems to improve worker
performance, reduce operations costs and accurately determine cooling loads.
Daylight design solutions include:
louvers
shading
skylights
www.betterbricks.com
• Awareness by the project owner for approval
• Building orientation on site (new construction)
• Glazing selection / 4 elevations
• Shading systems / glare control
• Interior surface reflectance
specifications / LRV
• Solar collector options / light pipe
• Applied sun louvers or solar films
• Integration of daylight with
electric lighting control systems
• Whole building energy modeling
integration of daylight, electric
lighting and HVAC to reduce costs
• Services from professional daylighting
laboratories
Planning for daylight integration
Begin plans with orientation of the building on
the site to take full advantage of sun angles for
daylight harvesting.
Glare control is essential to improve visual
comfort using glazing, shading and the
specification of correct surface reflection
values
excessive contrast
direct glare
reflected glare / specular surfaces
Conceptualize daylight harvesting early in the design process
Top lighting techniques
Illustrations from CHPS design guide
Clear glazing, light shelf
Shading
glare control
Light louvers. An example of some of the many new products are now
available for daylight harvesting
Upper window / daylight harvesting
Lower window, shading systems, glare control
Daylight analysis and computer modeling for LEED compliance
Provided by Bob Adams LC
3D Model of natural and electric lighting systems
Pseudo color rendering of illuminance values
Provided by Bob Adams LC
Footcandle gradations
Daylight analysis and computer modeling take the ‘guess work’ out of your designs
Provided by Bob Adams LC
Electric lighting rendering
Electric lighting computer modeling
Daylight analysis and computer modeling
New office lighting design methods with daylight integration to reduce energy
‘Layers of light’ to
reduce energy and improve
worker satisfaction
10-20 fc
ambient
30+ fc
vertical
20-40 fc
task
56%
TOTAL
ENERGY SAVINGS below
ASHRAE 90.1
New methods apply to schools, hospitals and libraries
Efficient lighting requires a holistic
5 step design approach
1. Daylight integration
2. Control systems
3. Task lighting at each station
4. Wall lighting
5. Ambient lighting
Lighting Design Process
Assignment of person(s) responsible for this process from start through completion
Design and management of the lighting;
•Owner awareness and commitment to
sustainable design / early education of lighting quality
considerations for approval.
•Creation of concepts for sustainable lighting goals
•Life cycle costing analysis / budget planning
•Formal lighting specifications for bids
•Supplier awareness of the specifications
•Contractor review to answer questions early
•Managing the costs / prevent costly value engineering
games played in our industry
•Site review and verification of specification compliance
•Commissioning / testing of all systems
•Owner / operator review of sustainable
lighting systems
•Maintenance training of systems, controls,
recycling and hazardous waste disposal to assure future
of the sustainable system
This process is essential to insure lighting quality for the owner
Useful lighting web sites
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Light Right Consortium
IALD International Association of Lighting Designers
PLD Professional Lighting Design Magazine
IES Illuminating Engineering Society
Lightfair International
Lighting Design Lab
Lighting Research Center
NLB National Lighting Bureau
Northwest Energy Efficiency Alliance
The Heschong Mahone Group
US Department of Energy
CHPS Collaborative for High Performance Schools
www.lightright.org
www.iald.org
www.pldplus.com
www.iesna.org
www.lightfair.com
www.northwestlighting.com
www.lrc.rpi.edu
www.nlb.org
www.BetterBricks.com
www.h-m-g.com
www.doe.gov
www.chps.net
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GE Lamps
Philips Lamps
Osram Sylvania Lamps
Venture Lamps
www.gelighting.com
www.lighting.philips.com
www.sylvania.com
www.venturelighting.com
Find this presentation and others on our web site
www.illuminart.net
Outdoor Lighting, LED Risk Management and others
Contact us to learn how our experience may be used to
help support the sustainable lighting goals of your next project