The number displayed on the remote is there for you to learn your dog’s benchmarks; there is no wrong number. The right number (intensity setting) is the number that interrupts the misbehavior or at least places a clear and significant cost on it. The goal is to interrupt the misbehavior, clearly and fairly, with lower light levels when possible and higher heavier ones when needed. After giving feedback, level down for hard flinches or yelps, and level up if there's no interruption or mental release. When in doubt, start low and work your way up gradually.