Lux Helsinki is a five-day light festival in the centre of Helsinki that is organised annually at the beginning of January. The festival presents a diverse range of light art along a new route each year that covers a few kilometres. In addition to the most famous buildings in Helsinki, the route also highlights lesser known courtyards and façades. The programme features specially commissioned new works and popular installations for international light festivals.
More info: http://www.luxhelsinki.fi/en