condition mean min max 4 h after light 171.3 171.3 171.3 8 h after light 241.7 237.8 245.6 12 h after light 517.8499999999999 506.4 529.3 4 h after dark 392.25 374.5 410.0 8 h after dark 379.35 369.8 388.9 12 h after dark 319.45 271.9 367.0