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Since synchronisation people’s inner clock
through daylight not ensured indoors during the
dark months winter, DIN SPEC 67600:201304
also includes specific design recommendations for
biologically effective lighting. this case, artificial
lighting solutions incorpo
rating wide-area panels
emitting diffuse light such ONDARIA tunableWhite
combined with lighting management are vital for
supporting daytime activities and ensuring good
night’s sleep.116
A user study lighting quality perceived offices
conducted jointly with Fraunhofer IAO shows that
users’ preferences with respect colour temperature
differ strongly.com/litecom
Stimulation the morning
Colour temperature: 5000 K
Eh* (daylight and artificial lighting): higher than 500 lx
Aim: synchronising people‘s circadian rhythm,
complete suppression melatonin release
During the day sunshine
Colour temperature: 4000 K
Eh* (daylight and artificial lighting): higher than 1000 lx
Aim: enhancing people’s well-being through
well-matched colour temperature, accordingly warmer
light colours during sunshine
During the day with cloudy sky
Colour temperature: 6500 K
Eh* (daylight and artificial lighting): higher than 800 lx
Aim: enhancing people’s well-being through
well-matched colour temperature, accordingly cooler
light colours with overcast sky
Getting ready for sleep
Colour temperature: 2700 K
Eh* (daylight and artificial lighting): higher than 500 lx
Aim: synchronising people’s circadian rhythm,
no interference with melatonin release, restful sleep
* horizontal illuminance
.
Thanks the LITECOM lighting management
system and therefore continuously adjustable
colour temperatures ranging from 2700 6500 K,
ONDARIA tunableWhite perfectly tailored the
users’ individual needs and biological requirements –
with technical perfection, the illuminance level
remains constant even with changing colour tempera-
tures. Usually, colour temperatures between
2700 and 6500 are perceived ideal, with clear
preference for 4000 and 5000 Another
result the study that office users rate their situa-
tion work significantly higher where possible
for them adjust the lighting their individual
needs.com/study-office
zumtobel.
Biological lighting effects
ONDARIA tunableWhite
zumtobel
