NAN lights are generally used to "tan" an Super red, giving it a deeper color. Personally, i think its a silly practice, a quality fish will become quality over time. One part of keeping Asian arowana is that it requires patience. As the fish matures it will exhibit better and better colors, its all part of the satisfaction of keeping the fish.
You won't be finding NAN lights in Canada, there are regulations that ban underwater appliances and such.
You won't need one for your Panda Gold though!