condition mean min max 4 h after light 0.3965245 0.358948 0.434101 8 h after light 0.230286 0.146545 0.314027 12 h after light 0.2198775 0.107387 0.332368 4 h after dark 0.487663 0.380872 0.594454 8 h after dark 0.303804 0.172467 0.435141 12 h after dark 0.2120185 0.207937 0.2161