I was thinking (yeah, happens from time to time).
1. Interiors in Salem are pretty dark. Stoves dont give much light as well as fireplaces in the mines.
2. Oil doesn't have many uses
3. Not many "decorative" things in salem.
How about:
1 iron bar + 2 nails + rope = Oil Lamp
This lamp can be attached to a wall of a mine. Has no collision. If mine wall gets destroyed so does the lamp.
Lamp would be refilled using 0,1 l of oil, can be filled with maximum 0,5l
Burning time after one refill: 3h20m (same as fireplace) (total: 16,5hrs when filled to max)
Cannot be placed outdoors.
Lamp post - for those living deep in the darkness and those that like when things look nice
5-6 iron bars + 4 nails + rope + (isinglass? would be weird glass pane? expensive) - Lamp post.
Same as oil lamp but placeable outdoors with collision.