Introducing Hanhui's High Transmittance Φ21.8mm light distribution solution, engineered for billboards and beyond. With a remarkable 93% transmittance and durable PC/PMMA materials, it offers six versatile angles (15°/30°/45°/60°/15×50°/30×60°) for optimal illumination. Experience uniform brightness and effective waterproofing with our high-quality design. Discover more at our website!