Custom Shapes & Perfect Fit
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.

Comprehensive PC and PMMA Diffuser Profiles

Clear Light Cover

Frosted LED Diffuser

Opal Milky Light Diffusers

Acrylic rod diffuser

black LED diffuser

linear optical lense

Microprismatic LED Diffuser

Co-Extruded Plastic Profile
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.
LED diffuser manufacturing process at EXLONG

feeding

Calibration

Water cooling

Profile haul-off pulling

online length cutting

quliaty and fits checking
Strict Dimensional Tolerances & Inline Quality Control for your diffusers

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

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

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

Cabinet & shelf Lighting
Cabinet & shelf Lighting

Commercial and Retail Lighting
Commercial & Retail Lighting

Horticulture & Grow Lights
Horticulture & Grow Lights

Vehicle & Transit Lighting
Vehicle & Transit Lighting

Outdoor & Waterproof Lighting
Outdoor & Waterproof Lighting
project gallery
Custom LED Light Diffuser Extrusion Cases
Technical FAQ
Custom LED Diffuser Extrusion & Manufacturing Capabilities
Can your extruded LED diffusers perfectly snap in or slide into standard aluminum channels?
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.
Acrylic (PMMA) vs. Polycarbonate (PC)—which material should I choose for my lighting covers?
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.
How do you ensure your frosted and milky diffusers achieve a dot-free without too much light loss?
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.
Will your clear and frosted plastic profiles turn yellow or brittle when used outdoors?
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.
Can you make co-extruded dual-color or multi-material lighting profiles?
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.
How does your black LED diffuser work? Does it really let light through?
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.
How long does it take to produce a custom extrusion diffuser?
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.
How do you guarantee the length accuracy of your extruded diffusers?
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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+8615816998103
LOCATION
No.5 Changxing Avenue East, Jun’an Foshan
528329 Guanggong China












