First of all, it was okay, but it lacked alot. Such as why is the sun going down, how did the dad know, how did the government know, why was the family involved, what did the kids do and what story behind them. Also what is the story behind mother. She takes pills, obviously she had mental break but exactly from what, they didnt exactly say who and why. Another thing what is the dads attitude, why does he act such, i mean you probably guess just from what is giving but you wont get much out it. Also why did the sun come back after just while. Thats what made me lose all hope for it. I get that it would snow but if the sun usually is destroyed or something happens to it, it doesnt just comeback like that, it would take year, maybe it wont even come back so that is very confusing.
Also if you were to have an after darkness movie or tv show, i expect it to keep going and creatures to start forming. That would catch my eye. Let the family live in the darkness, a world with out light and survive against monsters and other people. Let the movie or tv show live for a bit more or a series.