condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.087541 0.0 0.262623 12 h after light 0.0 0.0 0.0 3 h after dark 0.0 0.0 0.0 6 h after dark 0.09585500000000001 0.0 0.287565 9 h after dark 0.0 0.0 0.0 12 h after dark 0.128334 0.0 0.256668