Impressions of the Long Night of Museums 2010: Light Installation and Discussion on the Future of the Illuminant (from left to right: Martin Moeck/ OSRAM, Mario Druwe/ Kompetenzzentrum innovative Lichttechnik, Claudia Henne/ Moderation, Annemarie Jaeggi/ Bauhaus-Archiv Berlin, Axel Schmid/ Ingo Maurer Team)