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ÖFFENTLICHE BAUTEN • PUBLIC BUILDINGS TECHNISCHER AUSBAU • TECHNICAL SOLUTIONS

Podeste und Nischen für spannungsreiche Präsentationen • Pedestals and niches for exciting presentations

Das Tunable-White-Licht ermöglicht verschiedene Stimmungen. • Tunable White light allows for different moods Das warme Licht harmonierte zuvor nicht mit dem Tageslicht. • The warm light did not go well with daylight.

T he independence of the architecture, which according to Hermann F. Reemtsma, pa- cessary or adapted in line with the architecture. As a replacement for the QR CBC reces-
sed luminaires in swivelling or in swivelling and rotating rod versions, retractable multi-
tron and friend of Ernst Barlach who commissioned the museum, is expressed in
the solidity on the outside and in the inner concentrated organism for the collection, was functional luminaires with interchangeable optics (15° to 80°) were required, which can
fully preserved after a reconstruction in 1995/96. It manifests itself as a sequence of light, be pulled out and aligned as needed to accentuate exhibits. To implement the Licht01
clearly structured and diversely proportioned exhibition rooms, grouped around a central concept, wall washers for flush mounting in the existing and new recessed ceiling rings
inner courtyard, with daylight references that can be experienced again and again. Now were also required to meet the museum's requirements for even illumination of back-
the simple, still contemporary-looking museum building, which architect Werner Kall- ground surfaces.
morgen had realised in 1962 in Hamburg's Jenischpark, was to undergo lighting optimi-
sation. The task was to avoid any interference with the architecture, which is worthy of No colour point difference thanks to uniform Tunable White LED chip
protection. In particular, the concise ceiling structure presented lighting designers Katja
Winkelmann and Robert von Sichart from Licht 01 Lighting Design with a special chal- An exact match of the colour point for wall washers and multifunctional luminaires was
lenge, as it called for luminaires in a particularly small design. However, small luminaires imperative. This is because simultaneous illumination of the walls with both types of lu-
that combine a clean Tunable White solution with lighting characteristics suitable for mu- minaires results in overlaps that would make a colour point difference visible. After much
seums were not available on the market at the start of planning in 2016. The require- experimentation, a manufacturer in close cooperation with Licht 01 Lighting Design suc-
ments for design and size did not seem to be compatible with the technical lighting re- ceeded in modifying a spotlight and wall washer in a small standard design to accom-
quirements for colour rendering, luminous flux and, above all, colour point. modate the same Tunable White LED chip. To elegantly overcome the different sizes of
the flush-mounted luminaires and the ceiling cut-outs, individually milled spacer plates
Tunable White adapts artificial light to daylight dynamics were produced to ensure a uniform ceiling appearance. They also conceal the difference
in size of the wall washer and spotlight and allow them to be easily exchanged to re-
A Tunable White solution was favoured so that the artificial light could be adapted to the spond to requirements of temporary exhibitions. The automated adjustment of bright-
dynamics of the high daylight input. Due to the ceiling structure to be maintained in the ness and colour temperature to changing daylight conditions ensures that the artworks
exhibition rooms, power rails were out of question. The existing recessed ceiling lumi- always appear in the best light. Due to the excellent and energy-saving result, the Ernst
naire positions were to be retained wherever possible, supplemented if absolutely ne- Barlach Haus was nominated for the German Lighting Design Award 2020.

116 • AIT 5.2021