condition mean min max 4 h after light 10.463422999999999 9.781466 11.14538 8 h after light 9.3862445 9.368883 9.403606 12 h after light 9.054291 9.008074 9.100508 4 h after dark 9.4645955 9.222552 9.706639 8 h after dark 8.5949645 7.512097 9.677832 12 h after dark 8.52335 8.52335 8.52335