components such as the local network, video
surveillance systems, sensors, natural light
control, air conditioning systems and other
building systems in the context of building
automation. Therefore, the ILS can provide a
greater control over the quality, flexibility and
adaptability of the buildings’ lighting.
The theme of the Human Centric Lighting (HCL) is
considered imperative to LightingEurope jointly
with the LEDification process, which should not
therefore be understood and aimed only to
energy saving. It is important to note that in
this context, in fact, the definition of HCL is very
similar to the concepts of circadian lighting or
biodynamic lighting already introduced in
previous years. While according to a more recent
view, expressed by other bodies and authors,
the circadian lighting would be one of the key
elements, and certainly the central part of the
HCL, however, next to other design factors. 18,19 .
It is important to highlight that a product
cannot simply be defined as HCL, because the
concept of this new lighting is something that
must always be associated with the context,
which also includes people, time and interior
spaces, that is the application of the lighting
project as a whole. LightingEurope puts
emphasis on the fact that artificial lighting can
do much more than simply allow a proper visual
function. Lighting can energize, promote
relaxation, positively influence mood and
increase the level of subjective alertness and
cognitive performance, but also improve the
sleep-wake cycle. In other words, lighting can
support human’s health, well-being and
performance, combining the benefits of a
correct vision with the biological and emotional
ones of light. The true great value of the future
artificial lighting will therefore be in the right
combination of excellent visual, biological and
emotional benefits. In this framework, LEDs can
therefore do much more than encourage simple,
albeit important, energy savings. In this sector
the association of European producers has also
supported the development of the Lighting for
People 20 website developed as part of the
SSL-erate research funded by the European
Commission under the 7th Framework Program.
LightingEurope shares the principles of the
circular economy 21 and believes that with the
advent of LEDs and the goal of increasing the
life of these new lighting systems, the lighting
industry can be among the leaders in the area
of energy efficiency for industrial products. In
this sector there is a great deal of experience in
prolonging the products’ life, and in collecting,
recycling and reducing of hazardous substances.
The goal is to further reduce the ecological
footprint of this industrial sector. The concept
of circular economy is used to define an
economic system that regenerates itself and in
which the incoming material resources, and
waste, emissions and energy losses are kept to
the minimum necessary, trying to keep as much
as possible the energy and materials
consumption circuits enclosed in themselves.
The fundamental principle of HCL is that human
beings, with their needs for circadian vision and
stimulation, must be at the centre of the design
process. This should be the goal of the HCL,
although the use of this term is still controversial
and debated 22 , as well as the application of the
criteria for a new way of thinking the lighting 23 .
References
SCENIHR. 2012. Health effects of
artificial light. European
Commission
2
SCHEER. 2018. Opinion on
Potential risks to human health
of Light Emitting Diodes LEDs.
European Commission
3
Cajochen, C. et al. 2011. “Evening
exposure to a light-emitting
diodes (LED)-backlit computer
screen affects circadian
physiology and cognitive
performance”. Journal of Applied
Physiology (Bethesda, Md.:
1985), 110 (5): 1432–1438
4
Chang, A.-M. et al. 2015.
“Evening use of light-emitting
eReaders negatively affects
sleep, circadian timing, and
next-morning alertness”.
Proceedings of the National
Academy of Sciences of the
United States of America, 112 (4):
1232–1237
5
Green, A. et al. 2017. “Evening
light exposure to computer
screens disrupts human sleep,
biological rhythms, and attention
abilities”. Chronobiology
International, 34 (7): 855–865
6
CIE 158:2009 Ocular Lighting
Effects on Human Physiology
and Behaviour
7
CIE 218:2016 Research Roadmap
for Healthful Interior Lighting
Applications
8
CIE JTC9. 2018. CIE system for
Metrology of ipRGC influenced
light response. Available at:
http://www.cie.co.at/
technicalcommittees/cie-system-
metrology-iprgc-influenced-
light-response (Accessed: 13 Nov
2018)
9
IES TM-18-08. 2011. Light and
Human Health: An Overview of
the Impact of Light on Visual,
Circadian, Neuroendocrine and
Neurobehavioral
10
IES/ANSI RP-29-16. 2017.
Lighting for Hospitals and
Healthcare Facilities
11
DIN SPEC 5031-100. 2015.
Optical radiation physics and
illuminating engineering - Part
100: Melanopic effects of ocular
light on human beings -
Quantities, symbols and action
spectra
12
CEN (2017) CEN/TR 16791:2017
Quantifying irradiance for
eye-mediated non-image-
forming effects of light in humans
13
Ladopoulos, I. and Shaw, K. 2017.
IALD White Paper: Lighting
Design for Health, Wellbeing and
Quality of Light, A Holistic
Approach on Human Centric
Lighting. IALD. Available at:
http://iald.org/News/
Reflections-Newsletter/
1
IALD-REFLECTIONS-24-
February-2017 (Accessed: 13 Nov
2018)
14
van Bommel, W. 2006. “Dynamic
Lighting at work-both in level
and colour”. In 2nd CIE expert
symposium “Lighting and
Health”. Ottawa
15
Centro studi e ricerca iGuzzini.
2007. “La ricerca Sivra”. In More
than vision, 50–59. Recanati:
iGuzzini - Editoriale Domus
(ilibriGuzzini)
16
Rossi, M., Siniscalco, A. and
Zanola, F. 2009. “From
Physiology to a new sustainable
Lighting Design: the ‘My White
Light’ case study”. In Multiple
Ways to Design Research
Symposium 2009, 272–278.
Lugano: Swiss Design Network
17
Romm, J. 2016. 5 Charts That
Illustrate the Remarkable LED
Lighting Revolution. Available at:
https://thinkprogress.org/5-
charts-that-illustrate-the-
remarkable-led-lighting-
revolution-83ecb6c1f472/
(Accessed: 13 Nov 2018)
18
CIE TN 003:2015. Report on the
First International Workshop on
Circadian and
Neurophysiological Photometry,
2013. Available at: http://www.
cie.co.at/publications/report-
first-international-workshop-
circadian-and-
neurophysiological-
photometry-2013 (Accessed: 13
Nov 2018)
19
IALD. 2017. Joint Position Paper
on Human Centric Lighting by
LightingEurope and IALD.
Available at: https://www.iald.
org/IALD/media/Media-Library/
Advocacy/IALD-White-Paper-
%e2%80%93Lighting-Design-for-
Health-Wellbeing-and-Quality-
of-Light.pdf (Accessed: 13 Nov
2018)
20
SSL-erate. 2016. Lighting for
People – web-based platform for
high quality information on solid
state lighting in Europe.
Available at: http://
lightingforpeople.eu/ (Accessed:
13 Nov 2018)
21
Geissdoerfer, M. et al. 2017. “The
Circular Economy – A new
sustainability paradigm?”.
Journal of Cleaner Production,
143: 757–768
22
Houser, K. W. 2018. “Human
Centric Lighting and Semantic
Drift”. LEUKOS, 14(4): 213–214.
doi:
10.1080/15502724.2018.1501234
23
Rea, M. S. 2016. “Opinion: On
being PC”. Lighting Research &
Technology, 48(3): 266–266. doi:
10.1177/1477153516644160
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