condition mean min max 3 h after light 1.5100709166666666 0.105802 8.53999 7 h after light 1.170056 0.108693 7.2056 11 h after light 1.3698178166666666 0.0979978 6.54247 2 h after dark 2.032569 0.103023 8.69403 6 h after dark 1.8820115833333333 0.116064 7.73941 10 h after dark 1.74251275 0.115188 8.5969