Commercial fixtures are specified on efficacy and glare simultaneously. That tension is exactly what the diffuser has to resolve.
The efficacy-versus-glare tension
Energy targets push transmission up; comfort standards push glare down. A diffuser that scatters heavily will meet the glare requirement but cost lumens; one that is too clear will fail on comfort.
Why prismatic surfaces help
A prismatic surface redirects light where it is wanted rather than scattering it, so a fixture can meet a glare limit at a higher transmission than an equivalent frosted cover.
Retail and hospitality
Here appearance often outranks raw efficacy. Opal and frosted PMMA profiles give a soft, uniform surface; decorative projects use textured, coloured and two-colour profiles.
Specifying
State the minimum acceptable efficacy, the glare requirement, the appearance target and the mounting method. Trial lengths then confirm the choice in the real luminaire.
Related products and applications
Need this profile made to your drawing?
We extrude PC and PMMA diffusers, covers and lenses from your drawing, sample or photometric target. Tooling is developed in-house.
Frequently asked questions
Should I use a prismatic or frosted cover?
Prismatic if glare and distribution control matter; frosted if hiding the LED pitch matters most.
Do you support OEM programmes?
Yes, including work under NDA.