In modern architectural lighting systems, the choice of light source has long transcended the basic function of "illumination" and has gradually evolved into a comprehensive consideration of energy efficiency, comfort, and sustainability. LED back-lit panel lights, a widely adopted lighting solution in office spaces, commercial venues, and public buildings, are valued not only for their simple and beautiful appearance but also for their inherent energy-saving logic. This energy saving is not dependent on a single technological breakthrough, but rather on the synergy between high-efficiency LED light sources and precision light guide plates. The resulting optical system converts electrical energy into a uniform, soft, surface light source with extremely low energy loss. While meeting high-quality lighting requirements, it significantly reduces overall energy consumption, making it a powerful practitioner of green lighting concepts. Traditional lighting methods, such as fluorescent tube