A diffuser sheet should have a light transmission rate that matches the LED structure, not just the highest possible number. For LED lighting, the ideal range is usually about 60 percent to 90 percent, depending on the fixture depth, LED spacing, brightness target, and required glare control. ASTM D1003 is commonly used in the plastics industry to measure luminous transmittance and haze, so these two values should be reviewed together before confirming a material.

For LED panel lights, a diffuser sheet with 75 percent to 88 percent transmission is often a balanced choice. This range can keep good brightness while reducing visible LED dots. If the transmission rate is too high, hotspots may appear on the surface. If the transmission rate is too low, the fixture may lose too much lumen output and require higher power to reach the same brightness.

General Selection Reference

• Lighting Application Suggested Transmission Rate Key Focus

• LED panel light 75 percent to 88 percent Balance brightness and dot hiding

• Linear light 70 percent to 85 percent Uniform light output along the profile

• Ceiling light 65 percent to 82 percent Soft visual effect and clean appearance

• Anti-glare office light 60 percent to 78 percent Glare reduction and visual comfort

• Backlit display light 80 percent to 90 percent Higher brightness and clear illumination

Haze is just as important as transmission. A professional LED diffuser sheet needs enough haze to scatter light evenly. For shallow fixtures or large LED spacing, higher haze is usually needed to hide light spots. For deeper fixtures or high-density LED layouts, higher transmission can be selected to improve efficiency. EN 12464-1 uses UGR as an important reference for indoor lighting comfort, so anti-glare projects should also consider surface structure and beam control.

KUNXIN provides acrylic diffuser sheet, polycarbonate diffuser sheet, PS diffuser sheet, Prismatic Diffuser Sheet, Anti-Glaring Diffuser Sheet, light guide plate, optical film, and profile diffuser for LED lighting applications. Our factory has over 10 years of experience in acrylic sheet, polycarbonate sheet, and Optical Plastic sheet manufacturing, supporting customized transmission, haze, thickness, texture, color, cutting size, and processing requirements.

For project procurement, one sample with good appearance is not enough. Bulk order stability depends on raw material control, extrusion process, thickness tolerance, surface cleanliness, optical testing, and batch consistency. KUNXIN can help customers test the diffuser sheet with actual LED modules before mass production, so the final lighting effect can be confirmed more accurately.

Send your LED spacing, lamp depth, target brightness, sheet thickness, transmission requirement, and glare control target to KUNXIN. Our team can recommend a suitable Light Diffuser Sheet solution for panel lights, linear lights, commercial lighting, office lighting, and customized LED fixture projects.