Hey there @Ett_tingest and @aSensnmann, welcome to the Discourse! I am torn on the idea of needing fuel for lights. On one hand, it adds realism to the game, on the other hand, it adds a lot of extra work for the Hearthlings, and I am cannot think of any games similar to SH that have this type of mechanic.
The issue you bring up here has come up before…I am trying to find the post… Here it is: