On the topic of lighting, can't you capture fireflies in jars with this expansion?
Do those give off any light?
Also for sicknesses, Napping and Orange Juice give the "Home Remedy" moodlet, napping gives it for about 3H, while Orange Juice only gives it for a few minutes every sip, and given how slow Sims drink it barely lasts past the final sip.
As for Selvadorada poisoning... might have to take a vacation to Selvadorada to get an antidote whipped up from Bone Dust, or take a trip to the library to use a computer to order one, though how can you get poisoned outside of Selvadorada?
The Creepy Crawlies lot trait, right?