project lighting designARCHITECTURAL
Faculty of Architecture, Stephan Horn
University of Applied Sciences,60 EDUCATION
DarmstadtGERMANY
INDIRECT ACTION
The auditorium at the Facultyof
Architecture at the Universityof
Applied Sciences at Darmstadt,
Germanyhas undergone aslight-
lydrawn-out refurbishment thanks
primarilyto the decision not to
transplant operations to another
site while work was under way.
Thus the more complicated work
had to be squeezed in during the
holidayperiods, and so it was that
lighting designer Stephan Horn
(who is also avisiting Professor
at the faculty)was given twelve
weeks to come up with alighting
solution which, in keep-
ing with the architect’s
vision, used only
indirect light.
This stipulation proved
to be aconsider-
able stumbling block
when the appropriate
BREEAM (Building Re-
search Establishment
Environmental Assess-
ment Method) targets
were calculated.
The required luxlevels (500 lux)in
an auditorium of this shape and
size, with rising seating rows and
amaximum room height of 7.5m
would seem to dictate that direct
30x55Wlighting had to be used, because
compactconventional indirect luminaires
flourescentcouldn’t provide this coverage.
lamps.As the clock was ticking on the
iGuzzini’s DALI controlledtwelve week window,asolution
luminaire was used with thepresented itself within the US
required reflector also acting asDepartment of Energystudyinto
an acoustic shield and these areSpectrallyEnhanced Lighting.
run through an OSRAM DALI EasyBased on those studies, it was
controller,enabling the pro-possible to reduce the initial value
gramming of intelligent presets,of 500 lux(using standard lamps
that can take into account theof acolour rendering greater than
amount of daylight and to dim70and acolour temperature of
the luminaires that are close to3500 Kelvin) to approximately
windows. The auditorium is also360luxbyusing lamps with a
integrated into the superordinatedcolour rendering higher than 80
EIB control system, which allowsat acolour temperature of 5000
the selction of avarietyof scenes,Kelvin. The physiologicallyper-
such as might be required byceived brightness is the same.
presentation, exams, lectures andAs such it was possible to fulfil
so on.the BREEAM requirements using
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