This report is the result of a study realized by the LUCI Culture Commission chaired by the City of Glasgow, in collaboration with Cambridge Policy Consultants. Through contacts with 26 cities hosting more than 30 light events and detailed case studies from 10 cities (Chartres, Durham, Eindhoven, Glasgow, Gothenburg, Jerusalem, Lyon, Medellin, Montreal and Osaka), the report includes a wealth of information on how cities measure and demonstrate the success of their events