condition mean min max 4 h after light 3380.1563005 2862.30898 3898.003621 8 h after light 2868.5490145 2629.327511 3107.770518 12 h after light 3470.3405005 3351.965326 3588.715675 4 h after dark 3243.4890985 2947.189101 3539.789096 8 h after dark 2414.7365425 1746.306049 3083.167036 12 h after dark 3674.340054 3674.340054 3674.340054