condition mean min max 0 h after light 12.17615 12.1074 12.2449 4 h after light 6.9357299999999995 6.74195 7.12951 8 h after light 4.515655 4.50019 4.53112 4 h after dark 7.748429999999999 6.65337 8.84349 8 h after dark 8.555335 8.43396 8.67671 12 h after dark 11.5215 10.7193 12.3237