Beams illuminate a dwelling, but when it comes to absence of people, they stay unperceived. Properties lacking human presence stay dark. Absence of people to light up the light, no one's property to brighten.
Abandoned properties remain void of light, leaving the beams pointless. Glow seeks occupants, but in no one's residence, there's absence of people to brighten.
Mizz Percy Lights Are On But Nobody's Home YouTube