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 0.0 0.0 0.0 12 h after light 0.05652755 0.0 0.0917628 3 h after dark 0.0 0.0 0.0 6 h after dark 0.0348753 0.0 0.056038 9 h after dark 0.0 0.0 0.0 12 h after dark 0.065051 0.0 0.130102