The research highlights the urgent need for Egypt to enhance its agricultural productivity to meet the demands of its rapidly growing population. While widely used, the current prevalent method of surface irrigation suffers from inefficiencies primarily due to inadequate design and management. Consequently, there is a compelling demand for innovative field irrigation systems that can enable efficient water management. The Laser Spray Irrigation System (LSIS) is introduced as a groundbreaking alternative, characterized by its operation at low pressure, simulating gentle rainfall. This research aims to assess the performance of LSIS under varying pressure and spacing conditions and to evaluate its effectiveness as a replacement for Surface Furrow Irrigation (SFI) in terms of water use efficiency and maize yield under deficit irrigation scenarios. Laboratory experiments were conducted to evaluate LSIS performance. These experiments revealed that an operating pressure of 0.71 bar and a spacing of 4.0 meters between laser spray pipelines yielded optimal results. These results included a mean application rate of 11.23 mm/h, a coefficient of variation of 8.9%, a uniformity coefficient of 92.4%, and a distribution uniformity of 90.34%. These findings recommend the utilization of LSIS with a spacing of 4.0 meters and an operating pressure of 0.7 bar. Field trials demonstrated significant differences between LSIS and SFI. While SFI applied the highest volume of water (908.7 mm at 100% ET_c), LSIS utilized substantially less water (409.3 mm at 60% ET_c) yet achieved a superior grain yield (10.02 t/ha compared to 6.81 t/ha with SFI). Water use efficiency values were notably higher for LSIS, ranging from 1.907 to 1.436 kg/m3 across different water stress coefficients. Additionally, LSIS exhibited superior grain water production, surpassing SFI by 32.04% while using 12.94% less water. These results confirm LSIS as an advanced and efficient irrigation method, particularly effective under deficit conditions. Furthermore, LSIS demonstrated superiority over SFI across all levels of deficit irrigation, with the highest maize growth and yield recorded at 80% ETc, followed by 100% ET_c. This underscores the potential of LSIS in enhancing maize productivity and water use efficiency. In conclusion, LSIS represents a cutting-edge approach for optimizing irrigation water utilization, clearly demonstrating its superiority over conventional methods under deficit irrigation conditions.