condition mean min max 4 h after light 517.747 448.416226 587.077774 8 h after light 497.020983 468.539749 525.502217 12 h after light 424.51990950000004 416.833188 432.206631 4 h after dark 286.614623 191.001288 382.227958 8 h after dark 173.81263 119.82072 227.80454 12 h after dark 424.001288 424.001288 424.001288