The new LDL direct diode laser systems provide a compact and efficient solution for modern heat treatment. By eliminating fiber optics, the design reduces costs and complexity, improving both reliability and usability. With direct photon emission from diode edge emitters, the system achieves a wall plug efficiency of over 56 %, setting new standards in energy performance. The innovative architecture enables large-area irradiation across multiple meters, with significantly reduced system size and the design ability to operate from minimal to remote working distance. Modular power adjustment allows precise adaptation to various applications, reinforcing its versatility and compact design.