condition mean min max 4 h after light 8.3901155 8.324696 8.455535 8 h after light 8.774208 8.735096 8.81332 12 h after light 9.353981000000001 8.298466 10.409496 4 h after dark 8.118038 7.730159 8.505917 8 h after dark 8.4700815 7.302066 9.638097 12 h after dark 8.614263 8.614263 8.614263