In short
The difference between opal and microprismatic diffusers on linear LED lighting, and how each affects glare, efficiency and appearance.
The diffuser is the part of a linear luminaire you actually see. It shapes how bright the fitting looks, how much glare it causes and how efficient it is.
Opal diffusers
Opal diffusers are frosted and scatter light evenly. They give a soft, uniform glow with no visible LED dots, and suit hospitality, residential and feature applications where the luminaire itself is on show.
Microprismatic diffusers
Microprismatic diffusers have a precise surface pattern that controls the direction of light. They cut high-angle brightness, which makes UGR19 much easier to achieve in offices and classrooms.
Comparison
| Opal | Microprismatic | |
|---|---|---|
| Appearance | Soft, even glow | Crisp, technical |
| Glare control | Moderate | High |
| Best for | Hospitality, feature | Offices, education |
Other options
Louvre optics, like those on Aril, give even tighter glare control, and asymmetric optics can wash walls from a linear profile.
See the diffuser options across our ranges.
Further reading at 299 Lighting
Next steps on linear-led.com
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Start a project →Frequently asked questions
What is a microprismatic diffuser?
A diffuser with a precise prismatic surface that directs light downward and reduces high-angle glare, helping luminaires achieve UGR19.
Are opal diffusers good for offices?
Opal diffusers look soft and even but control glare less than microprismatic diffusers, so check UGR carefully for screen-based work.
