Key Insights from the Chart. UVB (280–315 nm): Nearly 100% blocked UVA (315–380 nm): About 99.8% blocked. Blue-Violet Light (380–500 nm): 60–90% blocked — strong filtering in this range, which is great for light sensitivity Visible Light (500–700 nm): Gradual reduction in blocking 40–60% blocked. Red/Near-Infrared (700–780 nm):  10–20% blocked