condition mean min max 4 h after light 4.609225 4.12567 5.09278 8 h after light 4.884175 4.72526 5.04309 12 h after light 5.145795 4.32714 5.96445 4 h after dark 7.088075 6.30313 7.87302 8 h after dark 6.9085149999999995 6.33395 7.48308 12 h after dark 6.445105 6.38151 6.5087