condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 4 h after dark 0.262222 0.0 0.524444 8 h after dark 0.2629555 0.0 0.525911 12 h after dark 0.2608275 0.0 0.521655