condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.01542235 0.0 0.0308447 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0384369 0.0 0.0768738