March 5 & 6, 2015
New strategies for applying light:
integrating variable white lighting products
Ann Schiffers – USAI Lighting
Senior VP of Specification Sales (MFA, BS, IES)
March 5 & 6, 2015
Brief review of light and color Definition of tunable white light Review of how light interacts with the circadian system
How new information will change the way you design Applications for tunable white light in architectural lighting
practice Example project from special guest
1. What is tunable white light and how is it tuned? 2. Different technologies used to achieve and create tunable white light3. Importance behind coordinating dimming, building control systems, and tunable white light fixtures4. Applications in which tunable white light has been used5. New opportunities for using tunable light that may help you
Catering to needs of patients and staff alike
Assist and promote comfort and recovery
Enhance visual acuity for medical professionals
Welcome visitors
Designed to promote appreciation of fine art
Visual presentation must be of the highest caliber
Colors rendered accurately Light levels high enough for
viewing, but below materials’ damage threshold
Have no UV or IR
March 5 & 6, 2015
380nm 780nm
IR
Radar
Radio
Gamma
UV-A
UV-B
UV-C
Electromagnetic energy
a physical, scientific definition
March 5 & 6, 2015
somewhat subjective, a physiological perception White comes in many
different shades and tones
“we know it when we see it”
RGB sources cover this whole color space (including non-white)
WHITE LIGHT
Uses a lot of energy allowance
Requires minimum 3 control zones
Fixture footprint on the larger side
Linear form factor
Socket shadow apparent
Color mixing is coarse at best
Light levels not very high (OK for ambient)
Curved applications difficult
Solid-state LED-based technology
Uses arrays of red, green, and blue LEDs
Different form factors available
Smaller footprint
Requires digital controls and communications
DMX controllers can be complicated
Color mixing must be commissioned
3 or 4 channels required at a minimum
Light levels of red, green, and blue adjusted independently
Range is large: “white” can be hard to find
“white” is often not uniform
Controls are simple and intuitive
Only two control channels are required: one for color temperature, one for intensity
Color mixing is handled on the fixture end
Uses all white LEDs Allows light to shift CCT
while always remaining “white”
Smooth tunable range from 2200K – 6000K (some are less, from 2700K-4000K)
March 5 & 6, 2015
All living things have a Circadian Rhythm
The circadian system regulates our biological cycles and functions
Light is the primary stimulus for the human body clock
we need light AND dark at the right times for our health
March 5 & 6, 2015
The back of the eye is filled with nerves and photoreceptors
Among the rods and cones was discovered a new photoreceptor
Intrinsically photoreceptive retinal ganglion cell (ipRGC) discovered in 2001
March 5 & 6, 2015
ipRGCs in the eye connect directly to the brain
This cell DOES NOT contribute to the visual system
This cell DOES contribute to human health and wellbeing
March 5 & 6, 2015
ipRGCs respond to light in a different way than other photoreceptors in the eye
ipRGCs are most responsive to 460nm (blue) light
March 5 & 6, 2015
Daytime visual system is most responsive to green
Nighttime vision (rods) is blue-shifted in comparison
Circadian system responds differently to light than either
March 5 & 6, 2015
ipRGCs in the eye connect directly to the suprachiasmatic nucleus
SCN is the main pacemaker in the brain
Light acts as the primary stimulus for the brain’s clock (SCN)
March 5 & 6, 2015
SCN tells the rest of the body what to do: it controls
Pineal gland – sleep / wake
Pituitary – growth, blood pressure, reproduction
Adrenal gland – stress Thyroid - metabolism
March 5 & 6, 2015
Brain controls production of hormone melatonin Melatonin helps with cell repair Reduced melatonin linked with
Diabetes Heart disease Cancer Obesity
March 5 & 6, 2015
We evolved with two light sources: night and day Today we live with artificial light sources Melatonin production is affected by our current lifestyle
March 5 & 6, 2015
Dr. George BrainardThomas Jefferson
University
Dr. Mariana FigueiroLighting Research
Center, RPI
Dr. Steven LockleyHarvard University
March 5 & 6, 2015
Seattle Mariners clubhouse lighting project Airbus Industries Mockup Benefits for students and office workers Lighting and Alzheimer's School for the Visually Impaired Auction House Optimization A morbid tale
March 5 & 6, 2015
Home team locker room Mariners wanted 5000 Kelvin before the baseball game, and
wanted 2700 Kelvin after the game. Used new tunable white technology –
2x2s.
March 5 & 6, 2015
“Whether due to jet lag or some other aetiology, our finds are of practical importance for the west coast teams, because they face the double handicap of playing away games after eastward trips. The result is that these teams are giving up more than one additional run in every game played after such travel.”
March 5 & 6, 2015
Airbus completed a mock up last year that was similar to a flight simulator. It was complete with seating, noise, vibration, etc. They installed tunable white LED to test the reduction effect on jet lag in intercontinental travel.
March 5 & 6, 2015
High CCT in morning (help wake up)
3500 to 5000K during normal work
Increased light levels for tests Low CCT and light level after
recess Studies conducted with
fluorescent, but will be much better with LED
March 5 & 6, 2015
Daylight is the ultimate tunable white light source
Daylight = better entrainment Studies show a correlation
between daylight and workplace satisfaction
Researchers and designers recreate daylight with tunable white light sources
March 5 & 6, 2015
Assisted living facilities lighting studies use high CCT, high light levels during day, low CCT and lower light levels in evenings
Results = reduced daytime agitation, reduced daytime napping, improved mood and socialization, increased nighttime sleep quality and duration
March 5 & 6, 2015
Visually impaired students use vellum sheet used to increase color contrast – but individual students’ needs vary
Tunable lighting allows students to customize contrast for individual needs for optimal task performance and visual acuity
March 5 & 6, 2015
Everything must be right for a multi-billion dollar art sale
High profile auction houses customize tunable sources to recreate the ideal light in which to view artwork – recreating the light that was used at time of work’s creation
March 5 & 6, 2015
Funeral homes ask for tunable white technology to provide the best possible viewing conditions for open-casket funerals
Able to customize the tunable light source for different skin tones
March 5 & 6, 2015
Jeanmarie Zimmerman AIA, ACHA, CCIDC, EDAC
Puchlick Design AssociatesAssociate / Design Director
Providence Holy Cross Palliative Care Canterbury Continued Care Retirement Community (CCRC)
Household
HYPOTHESIS A | Because the circadian clock is intertwined with most cellular metabolic processes and it is affected by organism aging, augmenting increased daylight openings with programmable clock “scenes” via “tunable” RGB fortified Tunable White Lights will improve resident outcomes.
HYPOTHESIS B | Integration of RGB Fortified Tunable White LED light programmed to Calendar year “Scenes” will improve Resident Outcomes.
Reasons for Using Tunable White Light
Reduction in sleep aide medications. Normalization of Bed Times. Regulated appetite. Regulated Melatonin levels. Reduction in Cardiac medications and incidences associated with
sleep irregularity. Increase in Resident engagement in spaces with Tunable White
Light augmenting natural Daylight.
Goals For Using Tunable White Light
Clinical Outcome Analytics Sleep Medications Data Resident Meal Data Patient Vitals Data
Metrics for Measuring Design Effectiveness