Optics Express,
Journal Year:
2023,
Volume and Issue:
31(16), P. 25724 - 25724
Published: June 2, 2023
Lighting
is
not
only
a
key
mediator
for
the
perception
of
architectural
space
but
also
plays
crucial
role
regarding
long-term
well-being
its
human
occupants.
Future
lighting
solutions
must
therefore
be
capable
monitoring
parameters
to
allow
dynamic
compensation
temporal
changes
from
optimal
or
intended
conditions.
Although
mostly
based
on
synthetic
data,
previous
studies
adopting
small,
low-cost,
multi-band
color
sensors
this
kind
parameter
estimation
have
reported
some
promising
preliminary
results.
Building
up
these
findings,
present
work
introduces
new
methodology
estimating
absolute
spectral
irradiances
real-world
scenarios
responses
10-channel
sensor
by
using
convolutional
neural
network
approach.
The
considered
here
are
tunable
white
floor
lamp
system
set
at
three
different
indoor
locations
and
comprise
combinations
LED,
fluorescent,
tungsten,
daylight
For
light
mixtures
various
components,
proposed
reconstruction
yields
estimates
power
distribution
with
an
average
root-mean-square
error
1.6%,
Δu'v'
less
than
0.001,
illuminance
accuracy
2.7%.
Sensor
metamerism
discussed
as
limiting
factor
achievable
certain
mixtures.
PLoS Biology,
Journal Year:
2022,
Volume and Issue:
20(3), P. e3001571 - e3001571
Published: March 17, 2022
Ocular
light
exposure
has
important
influences
on
human
health
and
well-being
through
modulation
of
circadian
rhythms
sleep,
as
well
neuroendocrine
cognitive
functions.
Prevailing
patterns
do
not
optimally
engage
these
actions
for
many
individuals,
but
advances
in
our
understanding
the
underpinning
mechanisms
emerging
lighting
technologies
now
present
opportunities
to
adjust
promote
optimal
physical
mental
performance.
A
newly
developed,
international
standard
provides
a
SI-compliant
way
quantifying
influence
intrinsically
photosensitive,
melanopsin-expressing,
retinal
neurons
that
mediate
effects.
The
report
recommendations
lighting,
based
an
expert
scientific
consensus
expressed
easily
measured
quantity
(melanopic
equivalent
daylight
illuminance
(melaponic
EDI))
defined
within
this
standard.
are
supported
by
detailed
analysis
sensitivity
circadian,
neuroendocrine,
alerting
responses
ocular
provide
straightforward
framework
inform
design
practice.
Journal of Biological Rhythms,
Journal Year:
2021,
Volume and Issue:
37(1), P. 3 - 28
Published: Dec. 30, 2021
The
various
non-standard
schedules
required
of
shift
workers
force
abrupt
changes
in
the
timing
sleep
and
light-dark
exposure.
These
result
disturbances
endogenous
circadian
system
its
misalignment
with
environment.
Simulated
night-shift
experiments
field-based
studies
both
indicate
that
is
resistant
to
adaptation
from
a
day-
night-oriented
schedule,
as
determined
by
lack
substantial
phase
shifts
over
multiple
days
centrally
controlled
rhythms,
such
those
melatonin
cortisol.
There
evidence
disruption
caused
work
results
not
only
between
external
cycle,
but
also
state
internal
desynchronization
levels
system.
This
case
rhythms
central
pacemaker
clock
genes
expression
tissues
peripheral
blood
mononuclear
cells,
hair
follicle
oral
mucosa
cells.
disruptive
effects
atypical
extend
beyond
profile
canonical
affects
other
transcripts
human
genome.
In
general,
after
several
living
at
night,
most
rhythmic
genome
remain
adjusted
day-oriented
dampened
group
amplitudes.
contrast
transcripts,
metabolomics
revealed
metabolites
hours
when
working
nights,
thus
leading
their
Altogether,
these
sleep-wake
emphasize
all-encompassing
impact
work,
can
contribute
increased
risk
medical
conditions.
Here,
we
review
latest
scientific
regarding
on
system,
alertness
shift-working
populations,
discuss
potential
clinical
impacts.
Frontiers in Neurology,
Journal Year:
2021,
Volume and Issue:
12
Published: Jan. 27, 2021
At
its
best,
human-centric
lighting
considers
the
visual
and
non-visual
effects
of
light
in
support
positive
human
outcomes.
worst,
it
is
a
marketing
phrase
used
to
healthwash
products
or
design
solutions.
There
no
doubt
that
environmental
contributes
health,
but
how
might
one
practice
given
both
credible
potential
implausible
hype?
Marketing
literature
filled
with
promises.
Technical
societies
have
summarized
science
not
yet
offered
guidance.
Meanwhile,
designers
are
middle,
attempting
distinguish
knowledge
from
which
dubious
make
decisions
affect
people
directly.
This
article
intended
to:
(1)
empower
reader
fundamental
understandings
ways
affects
health;
(2)
provide
process
for
can
dovetail
decision-making
already
part
designer's
workflow.
Annual Review of Environment and Resources,
Journal Year:
2022,
Volume and Issue:
47(1), P. 373 - 398
Published: June 15, 2022
The
nighttime
is
undergoing
unprecedented
change
across
much
of
the
world,
with
natural
light
cycles
altered
by
introduction
artificial
emissions.
Here
we
review
extent
and
dynamics
at
night
(ALAN),
benefits
that
ALAN
provides,
environmental
costs
creates,
approaches
to
mitigating
these
negative
effects,
how
are
likely
in
future.
We
particularly
highlight
consequences
increasingly
widespread
use
light-emitting
diode
(LED)
technology
for
new
lighting
installations
retrofit
pre-existing
ones.
Although
this
has
been
characterized
as
a
technological
revolution,
it
also
constitutes
revolution
impacts
ALAN,
because
LEDs
commonly
used
outdoor
have
significant
emissions
blue
wavelengths
which
many
biological
responses
sensitive.
It
clear
very
different
approach
required.
Building and Environment,
Journal Year:
2022,
Volume and Issue:
219, P. 109172 - 109172
Published: May 11, 2022
This
paper
presents
a
critical
review
of
studies
addressing
the
effects
window
views,
daylighting,
and
lighting
on
occupant
behavior,
perception,
performance,
well-being.
A
systematic
search
in
Scopus
database
was
performed
November
2021
yielded
515
hits.
Seventy-six
were
selected
according
to
following
criteria:
i)
papers
presenting
research
results
with
participants'
responses
ii)
accounting
for
lighting,
or
view
assessments.
The
study
setting
features,
participants,
predictors
outcomes,
statistical
approach,
reported
significance
level,
limitations
extracted
from
each
paper.
analysis
then
identified
differences
effect
predictor
outcome.
number
records
obtained
through
structured
240.
wide
range
have
been
used
indoor
assess
people's
responses.
most
commonly
artificial
features
-qualitative
-
followed
by
some
properties
light
sources,
such
as
correlated
color
temperature,
spectral
distribution
horizontal
illuminance.
Differences
methods
data
collection,
predictors,
ways
measure
outcomes
generated
inconclusive
that
limited
specific
study.
We
suggest
simple
model
prediction
performance
illuminance
temperature.
points
few
scattered
model,
therefore,
suffers
considerable
uncertainties.
Yet,
it
quantifies
ranges
are
comparable
similar
models
other
environment
domains.
Proceedings of the National Academy of Sciences,
Journal Year:
2023,
Volume and Issue:
120(42)
Published: Oct. 9, 2023
Experimental
and
interventional
studies
show
that
light
can
regulate
sleep
timing
sleepiness
while
awake
by
setting
the
phase
of
circadian
rhythms
supporting
alertness.
The
extent
to
which
differences
in
exposure
explain
variations
within
between
individuals
everyday
life
remains
less
clear.
Here,
we
establish
a
method
address
this
deficit,
incorporating
an
open-source
wearable
wrist-worn
logger
(SpectraWear)
smartphone-based
online
data
collection.
We
use
it
simultaneously
record
longitudinal
(in
melanopic
equivalent
daylight
illuminance),
timing,
subjective
alertness
over
seven
days
convenience
sample
59
UK
adults
without
externally
imposed
challenge
(e.g.,
shift
work
or
jetlag).
Participants
reliably
had
strong
daily
but
frequently
were
exposed
during
daytime
more
pre-bedtime
episodes
than
recommended
[T.
M.
Brown
et
al.
,
PLoS
Biol.
20
e3001571
(2022)].
Prior
several
hours
was
associated
with
lower
with,
particular,
brighter
late
episode
after
wake
linked
reduced
early
morning
(sleep
inertia).
Higher
longer
onset
latency.
Early
correlated
reproducible
robust
patterns
higher
daytime/lower
night-time
exposure.
Our
study
establishes
for
collecting
health/performance
provides
evidence
associations
important
determinants
health
performance.
Clocks & Sleep,
Journal Year:
2023,
Volume and Issue:
5(1), P. 116 - 140
Published: March 17, 2023
Light
use
is
rising
steeply,
mainly
because
of
the
advent
light-emitting
diode
(LED)
devices.
LEDs
are
frequently
blue-enriched
light
sources
and
may
have
different
impacts
on
non-image
forming
(NIF)
system,
which
maximally
sensitive
to
blue-wavelength
light.
Most
importantly,
timing
LED
device
widespread,
leading
novel
exposure
patterns
NIF
system.
The
goal
this
narrative
review
discuss
multiple
aspects
that
we
think
should
be
accounted
for
when
attempting
predict
how
situation
will
affect
impact
brain
functions.
We
first
cover
both
image-forming
pathways
brain.
then
detail
our
current
understanding
human
cognition,
sleep,
alertness,
mood.
Finally,
questions
concerning
adoption
lighting
screens,
offer
new
opportunities
improve
well-being,
but
also
raise
concerns
about
increasing
exposure,
detrimental
health,
particularly
in
evening.
EBioMedicine,
Journal Year:
2023,
Volume and Issue:
98, P. 104889 - 104889
Published: Dec. 1, 2023
BackgroundThere
is
no
consensus
on
reporting
light
characteristics
in
studies
investigating
non-visual
responses
to
light.
This
project
aimed
develop
a
checklist
for
laboratory-based
investigations
the
impact
of
physiology.MethodsA
four-step
modified
Delphi
process
(three
questionnaire-based
feedback
rounds
and
one
face-to-face
group
discussion)
involving
international
experts
was
conducted
reach
items
be
included
checklist.
Following
process,
resulting
tested
pilot
phase
with
independent
experts.FindingsAn
initial
list
61
related
light-based
interventions
condensed
final
containing
25
items,
based
upon
among
(final
n
=
60).
Nine
were
deemed
necessary
report
regardless
research
question
or
context.
A
description
each
item
provided
accompanying
Explanation
Elaboration
(E&E)
document.
The
testing
led
minor
textual
clarifications
E&E
document.InterpretationThe
ENLIGHT
Checklist
first
consensus-based
documenting
ocular
human
studies.
implementation
will
enhance
by
ensuring
comprehensive
documentation,
enhancing
reproducibility,
enabling
data
aggregation
across
studies.FundingNetwork
European
Institutes
Advanced
Study
(NETIAS)
Constructive
Thinking
(CAT)
programme;
Sir
Henry
Wellcome
Postdoctoral
Fellowship
(Wellcome
Trust,
204686/Z/16/Z);
Netherlands
Organisation
Health
Research
Development
VENI
fellowship
(2020–09150161910128);
U.S.
Department
Defense
Grant
(W81XWH-16-1-0223);
National
University
Singapore
(NUHSRO/2022/038/Startup/08);
Foundation
(NRF2022-THE004-0002).
Building and Environment,
Journal Year:
2024,
Volume and Issue:
253, P. 111323 - 111323
Published: Feb. 23, 2024
Beyond
vision,
light
influences
human
circadian
rhythms
and
buildings'
energy
consumption.
Design
solutions
are
needed
to
satisfy
visual
requirements
while
minimizing
lighting
demands.
By
reflecting
the
incident
radiation,
inner
surfaces
influence
spatial
spectral
distribution,
affecting
achieve
task
illuminance
light-induced
response.
Here,
walls'
characteristics'
impact
on
overall
luminous
environment
power
demands
is
analysed
in
a
test
room,
combining
seven
colours
three
sources'
correlated
colour
temperatures
(CCTs).
Hence,
luminaires
set
meet
needs:
eye
level
irradiances
measured,
responses
obtained
regarding
both
stimulus
(CS)
melanopic
equivalent
daylight
(mel-EDI).
It
found
that
parameters
higher
for
highly
reflective
walls
or
those
most
short-wavelength
interval,
being
insufficient
proper
stimulation
according
current
guidelines.
For
all
colours,
highest
mel-EDIs
occur
with
6000
K
CCT
lowest
3000
CCT.
On
contrary,
CSs
generally
lower
4000
K.
Second,
necessary
calculated.
With
warm
sources,
sufficient
CS
mel-EDI
values
achieved
similar
eye-level
illuminance,
requiring
outputs
regardless
of
wall's
colour.
In
other
cases,
corresponding
=
136
lx
much
than
reach
30%,
250
quite
always
highest.