This year, more than 20 artists have contributed to the installations across Berlin, which see well-known landmarks like the Brandenburg Gate, the cathedral and the TV tower in Alexanderplatz lit up in a myriad of colours and patterns.
Each window on the upscale Adlon hotel flips over, pulsating, while next to it the Brandenburg Gate is alive with projected film of bustling scenes from across the city.
Hotels in the city have reported an additional 600,000 overnight stays since the event began on October 10, the Berliner Zeitung newspaper said on Friday.
“Artists this year are doing more than lighting up the city, they are expressing stories, through art,” manager of the event Holger Meyer told the paper.
He added that each night, thousands of people come to stare at the lights, many of which come to life via video projection.
Sunday marks the last day of this year's festival, and it will not be ending quietly. A jazz concert in the central Minister Gardens is planned. A tandem bike service will also be available for the hard of seeing – a guide leads the bike and describes the illuminations.
Special bus, boat and bike tours will continue as normal until Sunday.