Well, upon each new visit the torches would simply be re-lit. It's not like Screen Secrets are at work or anything. And right at this moment scripts can't change the darkness of screens.
That sounds like a good idea, and certainly a similar but different take on the 4-6 bottles that typical Zelda games provide.
But it would require quite a few more tiles to be made for each variety of bottle contents. Suppose we kept the bottle sizes at 1, 2 and 3. Suppose also that we decided upon just four possible bottle contents. We'd then need:
* Three bottle tiles for each size
* Four size 1 bottle tiles containing 1 unit of each content
* Eight size 2 bottle tiles containing 1 or 2 units of each content
* Twelve size 3 bottle tiles containing 1, 2 or 3 units of each content
Not to mention that many items as well.
Ah, that's my mistake.