Tuning the Spectrum: Light, Health, and the Pursuit of ... · What does Tuning the Spectrum Mean?...
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Tuning the Spectrum: Light, Health, and the Pursuit of Happiness Leslie M. North, IALD, PE, LC, LEED AP Principal Aurora Lighting Design, Inc.
Transcript of Tuning the Spectrum: Light, Health, and the Pursuit of ... · What does Tuning the Spectrum Mean?...
Tuning the Spectrum: Light, Health, and the Pursuit of
Happiness
Leslie M. North, IALD, PE, LC, LEED AP Principal
Aurora Lighting Design, Inc.
Top 4 Healthcare Drivers
• Attracting patients • Addressing declining
work pool • Improving patient
outcomes • Improving financial
performance
“My favorite material is light. Light is for
comfort. Together with
space, light is the key to the future of
Architecture.”
- Santiago Calatrava
What does Tuning the Spectrum Mean?
Dynamic Terminology
• Dimming • Color Changing Color Preference
• Warm-Dim • Color Tuning • Circadian Reinforcement /
Tracking Alertness Therapy /
Circadian Mimicking
What Is White?
What Is White?
3500K
BBL
16 SDCM
4 SDCM
<3 SDCM
7 SDCM
What Is White?
Source: Acuity Brands
Color Changing (Light for Entertainment / Distraction)
Color Preference (Light for Mood / Expression)
Color Preference (Light for Mood / Expression)
Source: Philips
Warm-Dim (Light for Nostalgia / Intimacy)
• Decrease Color Temperature with Intensity
• Color Rendering across dimming range
Warm-Dim (Light for Nostalgia / Intimacy)
• Factory set v. User selectable
• Linear, Black Body, or Other
• Typically 2 or 3 CCT boards cross-faded
Color Tuning (Light for Consistency / Refinement)
• Can you Match Sources?
• Color Temperature • Color Rendering • Tint Control • Binning Tolerances
& Tolerance Over Time
Color Tuning (Light for Consistency / Refinement)
• Can you Match Sources?
• Color Temperature • Color Rendering
Color Tuning (Light for Consistency / Refinement)
• Tint Control • Multiple Color Point
Presets • Binning & Shift Dimming Over Time
4000K
BBL
4100K
3900K
Color Tuning (Light for Consistency / Refinement)
Color Tuning (Light for Consistency / Refinement)
Natural/Enhanced Color Balanced Color Vivid Color
Source: Acuity Brands
Circadian (Light for Natural Body Function)
Circadian Reinforcement / Tracking Alertness / Circadian Mimicking
Circadian Reinforcement (Access to Windows)
• Preterm infants Gained more weight Fewer days on ventilation
and phototherapy Enhanced motor function
Caution: Need Shielding; Overexposure may lead to retinal damage
Circadian Reinforcement (Access to Windows in “Sunny Room”)
• Decreased Length of Stay • Mortality Rate Lower • Improved Sleep Quality • Reduced Agitation in
Dementia Patients • Better Pain Management
Circadian Reinforcement (Light for Natural Body Function)
Source: Philips
• Premise is that occupant is diurnal • Can we truly mimic nature? • Energy Codes? Daylight Harvesting?
Circadian Reinforcement (Light for Natural Body Function)
Source: Visa Lighting
• Don’t forget the DARK nights • Low light charting
Control Systems Protocol
• Electronic Low Voltage (2-wire) • Fluorescent 3-wire • 0-10V (4-wire), multi-channel • DALI (4-wire) (v. 2.0) • DMX (4-wire) &
DMX/RDM (2-wire) • ZigBee (wireless) • Proprietary
Dimming Performance
100% 90 80 70 60 50 40 30 20 10 0
100%
90
80
70
60
50
40
30
20
10
Perceived Light
Dim
mer
Mov
emen
t
Linear VS Logarithmic Linear 50% = 67% Light Logarithmic 50% = 50% Light
Intelligent Driver
Dimming Performance M
easu
red
Ligh
t
100% 90 80 70 60 50 40 30 20 10 0
100%
90
80
70
60
50
40
30
20
10
Perceived Light
• 10% = 32% Perceived Load Shedding – High/Low
• 5% = 22% Perceived Energy Management Dimming
• 1% = 10% Perceived Daylight & Conference Rooms
• 0.1% = 3% Perceived Highest-Performance Spaces
Controls Issues
• Integration w/ other trades Shades, BMS, Nurse
Call • Integration w/ other
lighting/controls • Programming • User Interface • Overrides Code Blue, Nap time
Controls Issues
• Flicker • Unintended Color
Shift • All Dim to Same Color
at Same Rate
Source: Lighting Research Center at RPI
LEED v.4 for Healthcare Lighting Quality Point
• Individual control • Control from patient
bed • Multi-zone control for
all multi-occupant spaces At least 3 levels or
scenes
Circadian Reinforcement (Alertness / Circadian Mimicking)
• Dealing with Shifted Schedule Occupants
Source: nyas.org
Circadian Reinforcement (Alertness / Circadian Mimicking)
• Light Therapy Areas? • Separation from Diurnal
Thank You
Leslie M. North Principal
www.AuroraLD.com
