No worries about that, i am now an experienced snake keeper. I keep the temperature for my Dumerils boa as the same as for my BCI who actually need a bit more higher temperature than my Dumeril. But anyway, in my enclosures (except for my GTP) the warmth comes from the ground not from the above as i use only belly heating. So when he needs warmth he stays on the ground on the hot side. And he climbs his tree branch only at night when the heat source is off.