I'm trying to make a fantasy world with a longer night cycle than day.
With the advice of Renan, 12 hours of proper night, 4 hours of near/partial dark and 8 hours of good light. Similar to earth the cycle allows for entire planet to get moon and sun light in a day, but within the parameters of 12:4:8.
With this in mind the culture of the planet would be a night culture with sleep mostly occurring during the day. The main religion will be that of a lunar system with the moon being the main symbol of god, and the sun being a lesser 'evil' god and the right hand of the moon god similar to Hades.
Therefore the fauna and flora would need to be night based due to the lack of sunlight throughout the day. With a few large trees and other plants covering much of the forests in shade during day, and would be pitch black during night except for a small variety of luminescent fungus, bugs and sea life (such as reefs and some fish). Animals will be mostly nocturnal foraging and hunting during the night and sleeping during the day. Sea and river life will be less lively than on earth but in some areas more dangerous due to the longer nights, and less quantity of life to consume.
But how would the people survive in darkness and be affected by the short periods of sunlight?