Fiber lasers can be quite efficient and the weld process itself is very efficient as less energy is delivered to the metal to perform the weld. Good beam contro

Fiber lasers can be quite efficient and the weld process itself is very efficient as less energy is delivered to the metal to perform the weld. Good beam control ensures a minimum of metal is melted to perform the weld and also doesn't get too hot to vaporize and sputter. I don't know about overall efficiency but laser welding continues to displace electrical welding due to a much higher level of process variable control.