Hi Myselin, thank you for try my game.
You can find a torch in the chest at your home. Robert Joplin commented about the torch if you talked with him already (first NPC you find in the game, who provides the key of your home).
To burn the torch just press T, it's noted on the controls in the main menu, in the readme file and also in the description of the torch in the items section of the encyclopaedia. Use T also to toggle the torch at any time.
Let me know if you have any other issue. Cheers.