condition mean min max 4 h after light 7.494595 7.43659 7.5526 8 h after light 5.31851 4.98404 5.65298 12 h after light 6.68502 6.57418 6.79586 4 h after dark 7.607894999999999 7.10044 8.11535 8 h after dark 6.84628 6.64533 7.04723 12 h after dark 7.26269 7.18627 7.33911