condition mean min max 4 h after light 159.1 159.1 159.1 8 h after light 188.5 187.3 189.7 12 h after light 215.7 142.2 289.2 4 h after dark 250.5 156.1 344.9 8 h after dark 249.6 208.7 290.5 12 h after dark 237.1 214.2 260.0