We did experience Northern Lights three times during our voyage.
At Lofoten the Aurora Borealis was visible from 9:00 pm in 40 minutes while we were docked in Svolvær and again two hours later when sailing in the northern part of Raftsundet along Hinnøya.
Two day later for 45 minutes when we approached Berlevåg.
At the ships all Northern Lights sightings are reported in English and German over the PA when observed.
Link to Guide 'Choose the right season for Northern Lights'.
The footage in the video is still photos from the bow deck 6 and upper deck 9 of MS Trollfjord.
Link to page with more pictures.