condition mean min max 4 h after light 304.5 304.5 304.5 8 h after light 250.8 250.4 251.2 12 h after light 186.75 161.9 211.6 4 h after dark 167.2 165.8 168.6 8 h after dark 254.95 209.0 300.9 12 h after dark 261.5 247.6 275.4