condition mean min max 2 h after light 1.5252566666666667 1.28934 1.69803 6 h after light 0.5752203333333333 0.244944 0.923288 10 h after light 1.1875966666666666 0.230821 2.34264 14 h after light 1.1042420000000002 0.557818 1.45195 18 h after light 1.660105 1.00447 2.42175 2 h after dark 1.005024 0.43601 2.13109