The CIE 2025 Scientific Conference brought together over 430 participants from 40 countries across the global light and lighting community in Vienna from 7–9 July 2025.
CIE was pleased to welcome delegates from LUCI, DarkSky, ICC, and ISO, as well as guests from Oman and Algeria who expressed interest in establishing new national lighting communities.
The programme was rich and diverse — featuring three keynote lectures, six interactive workshops, two days of poster session, and an exhibition area showcasing the latest in lighting research and technology.
The conference officially began with a welcome reception at the iconic Vienna City Hall on 6 July and continued with special highlights such as a dedicated student networking event, CIE Gala Dinner, a sightseeing tour of Vienna, and even a spirited badminton tournament!
A standout moment of the week was the public Light Show at the Rathaus, where the renewed façade lighting — winner of the German Lighting Design Award 2024 — was presented in honour of Vienna hosting the CIE 2025 Midterm Meeting. With this, the City of Vienna officially welcomed the global light and lighting community.
Thank you to all who joined us and contributed to making this event so memorable — and a special thank-you to our sponsors and supporters for their invaluable contribution to the success of CIE 2025!
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