If the game does pause when you read a note, then there is even less time than I thought. But good to know about the difficulty in the main menu, I didn't realize that it effected the fuel. Are the fuel and the light decreasing unrelated?
They are related, i can give you the math, The fuel on easy takes about 2.30 minutes to die normal mode takes 1.30 to 2 minutes to die and hard takes about 0.45-1 minute to die, The light radius is bigger in easy mode around 0.80 size normal is 0.75 and hard is 0.70
