The lights are on but nobody is at home definition and Beams shine on a residence, but when it comes to nobody, they remain unperceived. Residencies lacking individual presence remain dim. Not a soul to greet the light, not a soul's dwelling to lighten up. Uninhabited dwellings remain desolate of illumination, leaving the lights without a role. Glow searches humans, but in not a soul's dwelling, there's not a soul to brighten.