condition mean min max 4 h after light 1790.792492 1653.732057 1927.852927 8 h after light 1788.8712655 1566.899246 2010.843285 12 h after light 1745.3581875 1715.032373 1775.684002 4 h after dark 2054.0159845 1928.648229 2179.38374 8 h after dark 1160.9962715 778.22051 1543.772033 12 h after dark 1886.881241 1886.881241 1886.881241