In short
Trimless lighting glare depends on the optic, not the trim; use microprismatic or deep-set optics and confirm UGR with room calculations.
A seamless ceiling still needs comfortable light.
Optics
Microprismatic diffusers and deep-set apertures reduce brightness at high angles.
UGR
Aim for UGR 19 or lower in offices and confirm with calculations.
Further reading at 299 Lighting
Next steps on trimlesslighting.com
Planning a trimless ceiling?
Send us your reflected ceiling plan. We'll come back with a shortlist, plaster-in details and lighting calculations.
Start a project →Frequently asked questions
Does trimless lighting cause more glare?
No. Glare depends on the optic and output, not the trim.
What UGR should office lighting achieve?
UGR 19 or lower.
