Prismatic Light Diffuser Sheet

Standard 1200 x 600mm troffer panels use 2.5mm prismatic. For larger panels (1500 x 600mm and up) or unsupported spans, step up to 3mm. For very large back-lit signage panels above 1m unsupported, we sometimes specify 4mm or 5mm.

Yes. Send us the dimensions or a sample of the old panel and we will CNC-cut to your size. Most cut-to-size prismatic jobs ship same day or next day, with cut tolerance of +/-0.1mm on the CNC.

Wipe with a soft microfibre cloth and warm water with mild detergent. Avoid solvent cleaners (acetone, methylated spirits, ammonia-based) which can craze acrylic. For greasy build-up in industrial environments, a 50/50 isopropyl alcohol and water mix is safe and effective.

No. Prismatic sheet is acrylic-based and holds up to long-term UV and fluorescent light exposure without yellowing. We see panels in service for 15+ years with no noticeable colour shift. The pattern moulded into the back may flatten slightly under heat over many years in high-output fittings; this is normal.

Standard prismatic sheet meets AS 1530 (Material Fire Tests for Building) and is suitable for use in commercial ceiling fittings under standard Australian building code. For special fire-rated applications (egress lighting, healthcare specific zones) specify a fire-rated grade at quote time.

Yes. Prismatic sheet diffuses LED and fluorescent light evenly behind a printed face, which is why it is widely used in back-lit signage and exhibition panels. For premium signage we usually pair it with a printed translucent vinyl on the smooth front face.

K12 is the most common prismatic pattern: square cells around 4mm across, with a balance of brightness and even diffusion. Microprism uses much finer cells (under 1mm) for a smoother appearance at close range, used in premium architectural lighting. Opal has no pattern at all, just pigment, for the softest and most uniform light.