Answer:
A distressed mood
Explanation:
There's a thrilling feel to the Haiku. As if it is preparing you for something that is about to happen. "Awake at night", so there's something to be done or to endure at night. "The lamp low, the oil freezing" shows that something will not be seen clearly since the lamp is low. Maybe, once the oil freezes, nothing at all will be seen.
