how to diffuse led light and LED strip lights

You may not see the technology behind a Luminit’s LED Light Diffuser, but you'll notice the effects of our optical diffusion lenses and light shaping diffuser film. We receive so many customer questions from people who are frustrated with cheap plastic LED diffusers, and we do our best to help. However, the issue is not diffusion; it's light bending and shaping that turns an LED beam into a true work or art.

Light Shaping Diffusers expand what’s possible with light using Luminit's advanced holographic beam shaping technology. Unlike conventional plastic light diffusion panels, Luminit's patented technology shapes light energy with holographic patterns embedded on polycarbonate film or rigid sheets. These patterns create a pseudo-random surface that can manipulate light by changing the direction of its energy. Available in both circular and elliptical formats, the diffusion ability of Luminit led light diffusers is remarkably efficient so high efficacy fixtures are possible. Many of our customers use  Luminit diffuser sheets to diffuse LED strip lights to hide hotspots and the result is a more uniform appearance. We also have the largest library of circular and elliptical beam angles in the world ranging from 1° to 100° so there is an angle to tackle just about any application.  

The World's Best Hiding Power

How does a Luminit diffuser for led lights help lighting designers and lighting manufacturers? Luminit broadband diffuser sheets and films “clean up” and shape a light beam to suit a particular purpose and that’s big. For example, LEDs are very efficient but hot spots and uneven light distribution remain a problem for lighting professionals. Our Light Shaping Diffuser sheets homogenize and shape the light with 85% to 92% transmission efficiency. The above picture demonstrates options for LED strip diffusion and the effects of a 60° x 1° elliptical LSD on an LED strip light. The light is shaped by spreading the horizontal radiation 60° only 1° in the vertical direction. The result is the elimination of hotspots on LED lighting as well as CCFL, fiber optic and laser light sources.

There's a reason Luminit is one of the leading light diffusing polycarbonate sheet manufacturers in the world. We have the largest catalog of LED light shaping diffuser sheets and light bending material as well the most of angles and formats available to diffuse LED lighting for architectural environments, bio-medical illumination, semiconductor metrology, aerospace, automotive, laser and display applications. Our diffusion technology is based on a very thin microstructure on top of the clearest substrates available. The transmission efficiency of our thin film and thick rigid diffusers is practically equivalent.

  • light shaping diffuser microstructures seen close up

  • Light Shaping Diffuser use surface relief structures that are replicated from a holographically-recorded master. These pseudo-random, non-periodic structures can manipulate light by changing the direction of its energy. The result is the elimination of Moire՛, color over-angle, and precise angular beam control.

Luminit Light Shaping Diffusers Have Capabilities Others Do Not

High Transmission Efficiency


Because the principle of surface scatter is used instead of volume or bulk scatter, our LED diffuser sheets have a much higher transmission efficiency (~92%) than a conventional LED light diffuser. Holographic Light Shaping Diffusers offer superior optical transmission between 200nm and 1500nm.  Depending on the angle of distribution, Luminit LED light diffusers achieve between 85% and 92% transmission efficiency. The low backscatter of the LSD structures are anti-reflective in nature and utilize light that would otherwise be wasted due to Fresnel loss. A clear piece of polycarbonate substrate is 89% transmissive. With a Luminit LED light diffuser added, transmission improves to 92%.  Note that Luminit measures transmission utilizing an integrated sphere with the LSD structure incident to the light source.  

  • output beam of surface relief LED diffusers

  •  comparison chart of Luminit LSD and bulk diffusers

Beam Shaping        

Luminit LED light diffusers precisely shape, control and distribute light. The patented holographic master recording process allows a variety of circular, or elliptical light patterns, and a wide variety of standard elliptical angles are available. To find out more about how Luminit light shaping diffuser film for LEDs can solve your next challenge, contact one of our light diffusion experts. 

Homogenized Light

“Hotspots” and uneven light distribution are common problems with filament, arch, LED, CCFL, fiberoptic and laser light sources. Our LED light diffuser films smooth and homogenize sources while providing uniform light in critical applications such as LCD backlights, LED displays, machine vision, automotive lighting and viewing screens.

Luminit LED light diffusers:

  • Provide precise beam control

  • Eliminate striations and beam non-uniformity

  • Supply direct view homogenization

  • Provide superior near-ceiling wall washing

  • Offer even illumination from ceiling to floor

  • Allow light diffusion even in damp or wet locations

Download the Data Sheet or Contact Us with any questions or how to purchase our LED light diffusers.