Why do we choose h7 led lights for car or truck?

As you know, standard h7 halogen lights is about 1500lm and power is 55w, but auto h7 led lights can give 1800lm-2200lm output and power of h7 lights led only about 20W.

led lights h7 also working 45° below zero and some special cold countries can also use them in Winter.