Train LED Light Diffuser - Full Specifications
Standard extruded profile data. Resin grade, finish, color and cross-section are all configurable to your luminaire drawing.
| Material | Polycarbonate (PC) / Acrylic (PMMA) |
|---|---|
| Surface finishing | Smooth or textured |
| Fire-retardant grade | UL 94-V0 · V5A grade available |
| Wall thickness | 2 mm |
| Cross-section size | 180 mm standard · custom to 500 mm |
| Light transmission | 80% |
| High-temperature test | 850 °C radiant-element (glow-wire) test available |
| Diffusion color | Milky / opal · diffusion-grade resin |
| Optical behaviour | Low inner reflection · LED source concealed |
Figures reflect the standard 180 mm train profile. Profiles outside this range are quoted against your section drawing - maximum extrusion width is 500 mm cross-section.
Diffusion-Grade LED Light Diffuser - Built for Rolling-Stock Luminaires
Every LED light diffuser extruded on this profile is engineered to hide the LED source completely while pushing 80% of the lumens through a milky, low-reflection optical surface - so passengers see an even line of light, never the diode array behind it. That single behaviour is what separates a purpose-built diffuser from a generic LED cover.
The 2 mm wall keeps overhead weight down for ceiling-cove and door-surround mounting, while the polycarbonate body absorbs the constant vibration of a moving carriage without crazing. For projects where optical clarity outranks impact load, the same profile runs in acrylic. Cross-sections are matched to your luminaire channel rather than forced onto a standard extrusion, making this a genuinely project-ready, wholesale LED light diffuser for vehicle fleets and station fixtures.
Wholesale Train LED Light Diffuser - Key Advantages for Project Buyers
Three procurement gates decide an interior lighting diffuser: fire documentation, service-life durability, and an exact profile fit. This product is built around all three.
// FIRE COMPLIANCE
Flame-retardant from the resin up - UL 94-V0 grade as standard, V5A available, and the 850 °C radiant-element test on request.
Rail fire codes such as EN 45545-2 or NFPA 130 gate every interior plastic on the vehicle. Supplying documented UL94-V0 material and 850 °C test data means one fewer non-compliant component to chase, and a shorter material-approval file for your homologation team.
// SERVICE LIFE
High-impact PC resists shatter and the continuous vibration of a moving carriage; UV resistance keeps the diffuser from yellowing.
These vehicles run for decades. PC does not crack like glass or embrittle like cheap acrylic, and stable colour means no mid-life refurbishment swap - fewer warranty replacements across the fleet and a lower lifecycle FF&E cost per car.
// EXACT FIT
Standard 180 mm section, custom profiles to 500 mm, extruded to your channel geometry on in-house tooling.
Every fleet and luminaire has its own channel. A matched profile in long continuous lengths means fewer joints down a carriage ceiling, a cleaner uninterrupted light line, and faster fit-up for your luminaire assembler.
Flame-Retardant Rail LED Light Diffuser - Material & Fire Engineering
Material selection is led by which constraint dominates the spec. Polycarbonate is tougher, holds up at higher operating temperatures and carries the stronger flammability profile - the default for enclosed cabin interiors. Acrylic is selected where peak optical clarity and surface hardness lead and the fire load is lower. The same profile geometry runs in either resin, so the optical result stays consistent when the grade changes.
Diffusion-grade milky/opal resin gives the low inner reflection that conceals the LED string, and smooth or textured finishing tunes the surface for a specific luminaire look. Raw resin is sourced from established brand suppliers so the UL grade is traceable lot to lot - which is what a fire-documentation file ultimately depends on.
High light transmission, 80%
LED source fully concealed
Low inner reflection diffusion
UV / weather resistant - no yellowing
High impact resistance
V0 self-extinguishing option
850 °C radiant-element rated material
Smooth or textured surface
Transit-Ready LED Light Diffuser for Rail & Metro Projects
One extruded platform covering the enclosed-vehicle lighting points where glare control and fire rating both matter.
Train interiors
Ceiling-cove and continuous-line cabin lighting; even, glare-free output for seated passengers.
Metro cars
High-cycle car and platform fixtures where UL94-V0 fire rating is non-negotiable.
Coach & bus
Vibration-tolerant overhead and side diffusers for long-distance and city fleets.
Station luminaires
Platform and concourse light diffusers in long continuous extruded runs.
Reference project: our factory developed the light diffuser used in Guangzhou metro lighting, on the same diffusion-PC platform offered here.
Custom Train LED Light Diffuser - OEM Manufacturing for Project Buyers
Send your luminaire channel drawing or a physical sample. Tooling is cut in-house, which is where your sample lead time and tooling cost come down.
Send your section
Drawing or sample of the existing luminaire channel - we reverse-engineer the profile to fit.
01
Tooling in-house
Dies are designed and cut in our own plant - no outsourced tooling delay or markup.
02
Resin & finish
Choose PC or acrylic to hit your fire spec; milky/opal color; smooth or textured surface.
03
Secondary ops
Precise cutting to length, punching, drilling and special export packing before despatch.
04
The plant extrudes across the full resin range - PC, PMMA, ABS, PVC, PS, PE, PP, TPE, TPU and ASA - so a single supplier can adjust the diffuser grade to your fire standard without changing the optical geometry you have already approved. Maximum extrusion width is 500 mm cross-section.
Factory-Tested Rail LED Light Diffuser - Quality & Fire-Safety Documentation
The documentation a procurement buyer actually needs is fire performance. This profile is supplied in UL 94-V0 material as standard, with V5A grade and the 850 °C radiant-element (glow-wire) test available so you have documented fire data to carry into your project's homologation file against codes such as EN 45545-2 or NFPA 130.
Resin is drawn from established brand suppliers, keeping the fire grade traceable batch to batch. In-process dimensional and optical checks confirm wall thickness, cross-section and the diffusion finish before any order is cut to length and packed - because a diffuser that arrives off-section or scratched is a diffuser your assembler cannot install.
Bulk-Order Rail LED Light Diffuser - Packaging & Shipping
Profiles are cut to the lengths your line needs and protected for the optical surface during shipping, then bundled for long extrusions and packed for export. Cut-to-length means your assembler is not trimming profiles on site, and protective film on the diffusion face prevents the scratching that would otherwise show as light defects once the luminaire is energised. Special packing for project shipments is available on request.
Train LED Light Diffuser - MOQ & Lead Times
Minimum order quantity depends on cross-section and tooling status. The standard 180 mm profile runs against existing tooling at lower order volumes; a custom section requires new tooling first, after which production volume sets the run. Because tooling is cut in-house, both sample and tooling lead times are shorter than an outsourced-die supply chain. Send your section and target volume for a project-specific MOQ and schedule.
Train LED Light Diffuser Gallery
Extruded LED light diffuser - milky-opal diffusion profile
Big train light diffuser - milky color
Big diffuser - diffusion polycarbonate
Dachang - Your Factory-Direct LED Light Diffuser Manufacturer & Supplier
Dachang is a dedicated LED light diffuser manufacturer and OEM supplier, extruding rail-vehicle diffusers from our own tooling since 1994. As a factory-direct LED light diffuser manufacturer - not a trading desk - pricing, tooling and the fire grade of your resin are all controlled under one roof, across a 15,000 m² plant.
That control is what makes Dachang a practical train LED light diffuser supplier: an in-house die shop, the full resin range for tuning fire performance, extrusion up to 500 mm cross-section, and a delivered reference in the Guangzhou metro.
1994
Extrusion factory established
15,000 m²
Production plant area
500 mm
Maximum cross-section
10+
Extrudable resin families
Train LED Light Diffuser - Procurement FAQs
Q: Do you provide secondary processing on the LED light diffuser?
A: Yes. Dachang, as a dedicated LED light diffuser manufacturer, runs secondary operations in-house - precise cutting to length, punching, drilling and special export packing - so profiles arrive ready for your luminaire line rather than as raw lengths.
Q: What is the maximum cross-section you can extrude?
A: Maximum extrusion width is 500 mm cross-section. This train profile is a 180 mm standard section; anything between is quoted against your drawing on custom tooling.
Q: Is the material fire-rated for rail vehicle interiors?
A: The diffuser is supplied in UL 94-V0 material as standard, with V5A grade and the 850 °C radiant-element test available. Dachang, as an LED light diffuser supplier with in-house resin control, can issue documented fire data to support your EN 45545-2 or NFPA 130 homologation file.
Q: PC or acrylic - which should I specify for train lighting?
A: Polycarbonate for fire load, impact and higher operating temperature - the usual choice for enclosed cabins. Acrylic where optical clarity and surface hardness lead. The same profile geometry runs in either, so we can co-select with your engineers without re-tooling.
Q: Can you match our existing luminaire channel?
A: Yes. Send a drawing or a physical sample of the channel and we cut matching tooling in-house, which shortens both sample and tooling lead time versus an outsourced die.
Q: Have you supplied transit lighting projects before?
A: Yes. Dachang, as a train LED light diffuser supplier, developed the diffuser used in Guangzhou metro lighting, running the same diffusion-polycarbonate platform offered here.