condition mean min max 0 h after light 0.9611875 0.721695 1.20068 4 h after light 0.1223405 0.0 0.244681 8 h after light 0.241011 0.237578 0.244444 4 h after dark 0.4721555 0.236777 0.707534 8 h after dark 0.7125035 0.709514 0.715493 12 h after dark 0.7142185 0.469181 0.959256