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LED Light Diffusers & Linear Optical Lenses Extrusion service

Looking for a reliable manufacturer for your lighting projects? EXLONG makes high-quality plastic LED light diffusers, custom plastic covers, and linear lenses. We can easily turn your drawing or design into a perfect clear or frosted plastic profile. Whether it is for office lighting, commercial lights, or outdoor fixtures, we make sure your covers fit perfectly and let the light through beautifully.

Custom Shapes & Perfect Fit

Co-Extrusion & Full Color Options

Anti-Glare & Brand-Name Materials

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black diffusers
ISO
9001:2015 Certified
10+
Plastic Extrusion Facilities
In-house Tooling
Fast Turn Around
Materials
Premium PC PMMA
Trust By
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kingwood
ilin
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Comprehensive PC and PMMA Diffuser Profiles

No matter what kind of linear lighting project you are working on, EXLONG offers a full range of custom plastic profiles to meet your needs. We specialize in extruding both Polycarbonate (PC) and Acrylic (PMMA) materials, giving you the perfect balance of light transmission, impact resistance, and beautiful finish. From standard linear light covers to complex architectural shapes, we supply everything directly from our factory.
clear diffuser sample
Clear Light Cover
Perfect for maximum light output, keeping your LED fixtures crystal clear with the mininum light loss.
frosted diffuser sample
Frosted LED Diffuser
Adds a beautiful, matte frosted texture to your cover while maintaining high light transmission.
opal milky white diffuser sample
Opal Milky Light Diffusers
Creates a beautiful, completely uniform glow across the surface, perfect for dot-free lighting.
acrylic rod diffuser sample
Acrylic rod diffuser
Creates a beautiful, completely uniform glow across the surface, perfect for dot-free lighting.
black diffuser sample
black LED diffuser
Looks sleek and solid black when turned off, but lets light pass through perfectly when turned on.
clear lens diffuser sample
linear optical lense
Specially engineered to control beam angles, focusing the light exactly where you need it for directional or asymmetric lighting.
micro prismatic diffuser sample
Microprismatic LED Diffuser
Features specially designed textured patterns to dramatically reduce glare and create custom, soft lighting distributions.
coextruded diffuser sample
Co-Extruded Plastic Profile
Combines two different colors or rigid and flexible materials in one single piece.

reliable light diffuser manufacturer

Tell us your detailed request about tubes and pipes, we will help find the best solution for your project.

Brand-Name Raw Materials: The Foundation of Quality Assurance

High-quality LED diffusers and linear lenses start with premium raw materials. To make sure your plastic covers stay crystal clear or perfectly frosted, EXLONG strictly uses 100% brand-new plastic pellets from world-class brands like Sabic, Teijin, Mitsubishi, and LG. We never mix in cheap recycled waste. By choosing these top-tier materials, we guarantee your custom profiles will have flawless surfaces, excellent light transmission, and superior UV protection so they won’t turn yellow over time.

extrusion plastic material teijin
extrusion plastic material sabic
extrusion plastic material mitsubishi
extrusion plastic material lg
extrusion plastic material mitsubishi

LED diffuser manufacturing process at EXLONG 

feeding

feeding

Our expert helps review your design before mold making step. This will help save your time.
calibration

Calibration

Our expert helps review your design before mold making step. This will help save your time.
water cooling

Water cooling

Our expert helps review your design before mold making step. This will help save your time.
continuous profile pulling via haul off

Profile haul-off pulling

Ensuring uniform wall thickness and precise dimensions
length cutting

online length cutting

Our expert helps review your design before mold making step. This will help save your time.
inline quality checking

quliaty and fits checking

Our expert helps review your design before mold making step. This will help save your time.

Strict Dimensional Tolerances & Inline Quality Control for your diffusers 

thickness check

Precision Tolerances

Controls profile dimensions within ±0.1 mm to ensure diffusers click perfectly into aluminum tracks without snapping or loosening.

fit testing

Form & Fit Testing

Performs rigorous cross-section matching and physical fit checks on every batch to eliminate assembly issues on the customer site.

inline qc

Inline Optical QC

Implements continuous inspection for surface defects, black dots, and optical consistency to guarantee batch-to-batch uniformity.

Custom LED Diffusers for Architectural & Linear Lighting

architectural linear lighting

Architectural linear Lighting

Architectural linear Lighting

cabinet & shelf lighting

Cabinet & shelf Lighting

Cabinet & shelf Lighting

commercial retail lighting

Commercial and Retail Lighting

Commercial & Retail Lighting

horticulture & grow lighting

Horticulture & Grow Lights

Horticulture & Grow Lights

vehicle & transit lighting

Vehicle & Transit Lighting

Vehicle & Transit Lighting

outer waterproof lighting

Outdoor & Waterproof Lighting

Outdoor & Waterproof Lighting

project gallery
Custom LED Light Diffuser Extrusion Cases

Co-Extruded Dual-Color Waterproof Diffuser
This black and opal square tube showcases our advanced co-extrusion capability, combining a solid black base with an opal milky diffuser section into a single seamless profile. Engineered from high-grade Polycarbonate (PC) for indoor waterproof applications, this profile highlights our precise extrusion ability.
co extruded black and milky square pc tube
Co-extruded PMMA Lens with a 0.2mm Frosted Surface
This optical linear lens is made from PMMA (Acrylic). Standard lenses often have an annoying yellow light at the edges. To fix this problem, we add a super-thin 0.2mm frosted layer directly onto the curved surface during extrusion. This smart update completely gets rid of the yellow light and messy colors, giving your linear lights a clean, smooth, and even light beam.
linear optical lense
Extruded PC Micro Prismatic Diffuser
This clear diffuser is made from Polycarbonate (PC) using our specialized embossing extrusion process. The textured pattern on the clear surface creates a high-performance micro prismatic structure. This smart design is widely used in office linear lights to achieve excellent anti-glare effects, protecting your eyes while still keeping the maximum light output.
microprismatic light diffuser
Extruded Black LED Diffuser for Hidden Lighting
This black diffuser is designed for modern linear lights to create a cool, hidden lighting effect. When the light is off, the diffuser blends perfectly with black aluminum channels to look like a clean black trim. When the light is turned on, it lets the light pass through beautifully with a soft, even glow.
black diffusers

Technical FAQ 

Custom LED Diffuser Extrusion & Manufacturing Capabilities

Yes, absolutely. We understand that precision fitment is a key concern in linear lighting. To guarantee a flawless match, we do real snap-fit testing by using the specific aluminum channels provided by our clients during production. Whether your project needs a secure snap-in or a smooth slide-in mechanism, this physical testing guarantees a reliable, flawless integration every time.

It actually depends on where you are going to install your lights. If you are developing a fixture for indoor use in an office or a luxury store where strong light transmission (up to 92%) and scratch resistance is important, then PMMA is the best bet. However, we strongly recommend PC if your applications are for outdoor, industrial or low temperature conditions where safety, shatter resistance and UL94 flame retardancy are required.

We achieve this by combining 100% virgin resin with quality light diffusion additives, and not simply roughening the surface. This means our satin and opal milky diffusers are able to totally conceal LED hot spots and pixelation while still providing a great 70% to 80% light transmittance, giving you a perfectly even, smooth glow.

No, they won’t. Cheap recycled materials tend to turn yellow extremely rapidly under sunlight. To avoid this, EXLONG only uses brand-name raw materials (Sabic, Teijin, Mitsubishi, LG) pre-mixed with expert UV stabilizers. This ensures our custom outdoor LED covers stay bright, tough, and yellow-resistant even after years of direct exposure to sunlight.

Yes, co-extrusion is one of our main manufacturing capabilities. We can mix several materials or colors into one profile, e.g. a solid black or white base with a clear/frosted top optical part. This is ideal for architectural linear lights and recessed wall-washing fixtures.

It works great! Our formula is a specific dark pigment. When the LED strip is switched off, the diffuser appears sleek, solid black, and fits seamlessly with dark architectural tracks or modern ceiling designs. When the lights are turned on, it instantly transforms to let the light pass through clearly without changing the color temperature of your LEDs.

First our technical team will analyze your 3D files or design drawings to see whether the shape is suitable for plastic extrusion or not. Then we construct the custom steel mold and produce the first samples for your confirmation, which will take about 10 to 15 days. Once you approve the samples we start the mass production. This takes about 15 days and includes our thoroughly cooled manual cutting and cleaning off the plastic dust before we ship everything off.

We let all extruded profiles cool down and stable entirely first, this completely removes dimensional inaccuracies due to thermal shrinkage. Then, our skilled technicians perform manual precision cutting to your exact length specifications, ensuring clean, burr-free edges.

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LOCATION

No.5 Changxing Avenue East, Jun’an  Foshan
528329 Guanggong China

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