condition mean min max 4 h after light 4922.6 4922.6 4922.6 8 h after light 4542.65 4535.6 4549.7 12 h after light 4189.55 4023.8 4355.3 4 h after dark 3514.0 3299.4 3728.6 8 h after dark 2866.25 2768.9 2963.6 12 h after dark 3579.25 3020.3 4138.2