Material: Glass lens with optical clarity designed for LED torches and headlamps. Diameter options: Available in diameters from 41 mm to 60 mm to fit a wide range of flashlights and headlamps. Structure: Planoconvex design provides a wide, even beam for improved visibility. Thickness: 1.6 mm to 1.9 mm, offering durable performance without adding unnecessary weight. Key benefits Clear, bright light: Glass construction delivers optical clarity to minimize distortions and enhance beam quality. Wide compatibility: The 41 mm to 60 mm size range fits many flashlight and headlamp models, simplifying upgrades or replacements. Even illumination: The planoconvex geometry helps produce a broad, uniform beam, reducing hotspotting for better visibility in dark environments. Lightweight durability: Moderate thickness (1.6–1.9 mm) balances strength with minimal impact on overall device weight. 23 practical use scenarios Outdoor adventures: Upgrade a headlamp or flashlight for camping or night hiking to achieve a broad, even field of view and better navigation in rugged terrain. Professional inspections: Use in maintenance or inspection tasks where consistent, wide illumination reduces shadows and improves detail recognition. DIY flashlight projects: Suitable for builders upgrading custom flashlights within the 41–60 mm diameter range, enabling reliable performance without excessive weight.