Using Prismatic Sheets and Optical Films for UGR<19 Low-Glare Lighting

Achieving a UGR<19 compliant luminaire with a premium opal light effect requires the right combination of optical materials. In most high-quality LED panels, this effect is created by pairing a translucent or semi-opal optical film with a solid prismatic diffuser sheet.

The clear prismatic sheet plays a critical role in beam angle control, helping reduce glare and maintain high luminous efficiency. Meanwhile, the optical diffusion film conceals visible LED hotspots, resulting in a soft, uniform light output that enhances visual comfort in architectural and office lighting applications.

At Hexatron, we supply both prismatic sheets and optical diffusion films for UGR<19 lighting designs. These components can be assembled mechanically or, in some configurations, bonded together for enhanced optical stability.

In LED panel assemblies with Light Guide Plates (LGPs), bonding is typically unnecessary—the reflective film, LGP, optical diffusion film, and prismatic sheet are securely held together by the panel’s frame and assembly structure.

Example Material Combination

• Plexi Honeycomb Prismatic Sheet + Opto90 PET225 Optical Film

This pairing delivers outstanding glare control, light uniformity, and aesthetic diffusion, ideal for indoor LED lighting, office panels, and architectural luminaires that require UGR<19 performance.

We do have some standard mold for the Pyramid profile lens and some inventory that allows to reduce lead time and tooling fee. The Honeycomb profile is currently custom produced.