condition mean min max 4 h after light 3603.0 3603.0 3603.0 8 h after light 3484.8 3060.2 3909.4 12 h after light 3116.15 3031.8 3200.5 4 h after dark 3065.25 2736.1 3394.4 8 h after dark 2880.9 2581.3 3180.5 12 h after dark 3028.85 2568.6 3489.1