You want ambient air in the low 80's (80-83). You want a hot spot in the low 90's (90-93). To create the hot spot, use the UTH and set the temp to 90. Place a hide over the UTH. The heat from the UTH will get trapped in the hide making a hot spot for the snake. Aside from the hot spot, you want roughly 1/3 of the enclosures floor heated for the snake to help with digestion and controlling body temp.