Most reindeer live North of the Arctic Circle, where the sun does not rise above the horizon in winter months. I suspect most summer days are brighter than the few hours of twilight the reideer get in December.

Awesome progress! Your plant looks very happy in its environment, it’s actually flowering.

However, to keep a string of turtles focused on leaf and vine growth, it may be a good idea to cut off the flower stalks. This plant is not known for pretty flowers, and actually the odd little sky-reaching stalks are the extent of its flowering glory.