Winter in Lapland isn’t as dark as it sounds. The snow reflects a lot of light, often making it just possible to see without a headlamp. If the moon is bright it’s almost as if the sun were still shining.
In February the length of day is between 6 hours at the start of the month and 9 hours at the end, quite a big change! You can easily add an hour or two at each end of the day as twilight is much longer than in lower latitudes.