condition mean min max 4 h after light 7.7825435 7.150349 8.414738 8 h after light 8.406006 8.045722 8.76629 12 h after light 8.2780205 7.188038 9.368003 4 h after dark 7.857549000000001 7.682362 8.032736 8 h after dark 7.9649915 6.759816 9.170167 12 h after dark 8.034219 8.034219 8.034219