"But you must remember to keep the porch light on"
It was still light when I left acupuncture at 7:30 but it was dusk when I got to Fiesta Farms at 8, and full dark when I left it at 8:30. I put on my head light (it's affixed to a band that goes round the head, supposedly for handymen) and the bike's tail light to go home. And home was dark. In winter I keep the fluorescent kitchen counter light on all day, so there's light in the house when I come home. Haven't done that since May. And now I must start doing it again.
The porch light itself doesn't give much light, and anyway, the headband headlight illuminates the door quite satisfactorily, thank you.