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There was a great deal of
concern at the conceptual stage of this project about eye adaption
walking from a brightly lit space into an exhibition area with levels
of no greater than 50 lux. There was also concern as to how we could
stop the spill of daylight into the sensitive exhibition areas.
After extensive daylight studies and working with the architect,
we agreed that the tensile fabric structure covering the main volume
that accessed the exhibition spaces should have a transmission factor
of no greater than 10 per cent. Each of the exhibition spaces was
protected by a solid wall on entry that controlled daylight spill
and provided an initial adaption zone. Although academic principles
would suggest that the area for eye adaption was insufficient, in
reality it was more than adequate for this testing arrangement.
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