condition mean min max 4 h after light 4841.1 4841.1 4841.1 8 h after light 4773.35 4333.3 5213.4 12 h after light 5986.15 5150.2 6822.1 4 h after dark 7338.15 6960.8 7715.5 8 h after dark 6576.85 6361.5 6792.2 12 h after dark 4838.3 4065.0 5611.6