condition mean min max 4 h after light 1.111394 0.789888 1.4329 8 h after light 0.818875 0.773955 0.863795 12 h after light 0.995047 0.945244 1.04485 4 h after dark 1.711215 1.60648 1.81595 8 h after dark 1.0297975 0.874055 1.18554 12 h after dark 0.79725 0.679346 0.915154