1. Less impactful and more for logic consistency: screamers are attracted by the flickering warm light coming from fire, not from cold electrical light, because half of the abandoned buildings are lit electrically. So, adding candles to heat map: yes, insect lights: no.
Bug lights spark and flicker and make a loud snap when zapping a bug....so they need a heatmap. I only made it equal to a candle, which isnt much, imo it should be much more but this seemed a good compromise.