Lighting & Signage Sheet

Diffusers, lightbox faces and illuminated fascias — even output with no visible LED lines.

Illuminated signage lives or dies on evenness. A face that shows the LED strip through it reads as cheap regardless of the graphics, and the fix is always the same: match the sheet to the cavity, not the other way round.

We supply both sides of this — PC diffuser sheet at above 95% diffusion uniformity for luminaires, and opal acrylic in several opacity grades for sign faces.

Illuminated signage using opal acrylic and polycarbonate diffuser sheet

Which material for which job

Application	Specify	Why
LED panel and linear luminaires	PC diffuser	Heat tolerance, will not crack on assembly
Lightbox and fascia faces	Opal acrylic	Brighter, better colour, lower cost
Channel letters	Acrylic, cast for machining	Clean routed edges, flame polishes
Vandal-prone external signs	Polycarbonate	Impact resistance
Edge-lit features	Fluorescent acrylic	Luminous cut edges

Typical applications

Illuminated fascia and shopfront signage
Lightbox and menu board faces
LED luminaire diffusers and covers
Channel letters and built-up lettering
Exhibition and display backlighting

Minimum order and lead time

For polycarbonate signage sheet projects, Plastura checks signage material selection before confirming the material. Send the span or finished dimensions, exposure and load conditions, preferred appearance, fabrication needs, and quantity. Standard stock sizes and colours normally run in 7–10 days; non-standard extrusion in 12–18 days; allow another 3–7 days for CNC work. The published starting point is 100 m² or 1 tonne, quoted in USD on FOB, CIF or DDP terms. See MOQ, lead time and shipping for planning details.

Questions buyers ask

Why can I see the LEDs through my sign face?

The sheet is too transmissive for the cavity depth and lamp spacing. Either move to a higher-hiding opacity grade or deepen the box. Send us both figures and we will send samples to test.

Acrylic or polycarbonate for sign faces?

Acrylic for most signage — brighter, better colour stability, cheaper. Polycarbonate where vandalism or impact is a real risk, accepting slightly lower brightness.

Will illuminated sheet yellow over time?

Not from LED light with virgin material. Yellowing comes from recycled base resin or from lamps running hot against the face.

Request a quote MOQ & shipping

Inputs that decide the diffuser material

A useful lighting-sheet enquiry starts with the LED layout rather than a colour name. Send the LED pitch, distance from LED to diffuser, visible opening, target appearance when lit and unlit, and whether the part is flat, bent or formed. These variables determine whether polycarbonate diffuser sheet, opal acrylic or another construction should be trialled.

Project condition	Candidate to screen	Confirm before ordering
Impact, handling or transport risk	Polycarbonate diffuser sheet	Fire requirement, optical target and surface finish
Display appearance and rigid fabricated letters	Opal acrylic	Forming method, edge finish and impact exposure
Outdoor illuminated enclosure	Weatherable sheet selected for the assembly	UV exposure, sealing, temperature and maintenance access

How to request an optical trial

State the target transmission and haze if your design has them, but also provide a photograph or acceptance description for hotspots and brightness uniformity. Optical values alone do not predict the appearance of every LED pitch and cavity depth. A sample should be reviewed in the intended geometry before a production order.

Review polycarbonate LED diffuser sheet or compare white opal acrylic, then include the LED layout with your quotation request.

From the factory