condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.01534515 0.0 0.0306903 4 h after dark 0.040625 0.0268248 0.0544252 8 h after dark 0.0133243 0.0 0.0266486 12 h after dark 0.022285 0.0 0.04457