condition mean min max 4 h after light 184.382186 183.656279 185.108093 8 h after light 236.8542455 209.011191 264.6973 12 h after light 225.9199505 209.079553 242.760348 4 h after dark 217.538832 193.660724 241.41694 8 h after dark 216.732368 170.924364 262.540372 12 h after dark 145.770518 145.770518 145.770518