In Alaska, plants can grow freakishly large due to the 20 hours of sunshine they receive per day – which gives them a photosynthesis bonus. Examples include 138 lb cabbage, 65 lb cantaloupe, and 35 lb broccoli. A noted side effect is that the produce is also much sweeter due to the extra sunlight.
A valley settlement in Norway that lives in shadow for nearly half of every year has installed giant mirrors on an adjacent mountain to redirect sunlight into the town’s square, all based on a plan that was thought up 100 years ago.
There is a town in the Alps that does not get any direct sunlight for 84 days. However the town fixed that by installing a giant mirror on the side of the mountain.