Boa constrictor tank set up?

150 watt is too, too hot, especially for the snake to curl under and def too much for a tank that size, no place for the snake to get away from the heat, they need coolness and darkness just as much as basking time. Like all reptiles, they need at least 85% to get them in the mood to eat and they also need the heat to digest. Turn on at day break, off at night fall