condition mean min max 4 h after light 6310.8 6310.8 6310.8 8 h after light 5790.1 5509.3 6070.9 12 h after light 5039.1 4878.4 5199.8 4 h after dark 5114.85 4578.1 5651.6 8 h after dark 5210.8 4637.6 5784.0 12 h after dark 5564.3 5528.6 5600.0