condition mean min max 4 h after light 6.509345 6.32262 6.69607 8 h after light 4.171225 3.90062 4.44183 12 h after light 3.966645 3.5686 4.36469 4 h after dark 4.794713333333333 4.35955 5.36138 8 h after dark 6.997913333333333 5.79872 7.99914 12 h after dark 6.34774 5.84086 6.66525