G-Series Glare Control and Gain Diffusers

Glare Suppression

G-Series glare control diffusers suppress high-angle light above 65 degrees to reduce visual glare and improve the Unified Glare Rating (UGR) of luminaires. This helps luminaires comply with IESNA RP1-04 and EN12464 glare specifications. These patented² and patent-pending diffusers, unlike conventional prismatic sheets, have a soft cutoff with no color separation thereby increasing visual appeal and LED hiding ability.

G-Series Diffusion


G-Series diffusers can increase central (on-axis) candela intensity by up to 30%, or as high as 60% when used with a C-HE55 or C-HE80 diffuser.

An optional anti-wet-out coating is available on the back surface for compatibility with edge lit lighting (light guide plates). 

Product Appearance Glare
L65° / L0°
(% of CBCP, typical. Lower is better)1
2' x 2' 4000 lumens typical 
L0° G-Series / L0° Lambertian
(Typical Edge-Lit Panel)1

L0° G-Series / L0° Lambertian
(Typical Edge-Lit Panel)1

G-Series with C-HE80
Angle FWHM (Typical)1 Efficiency in LED luminaire (Typical)1
150% 90° 89 - 93%
G-GPHS 1.5 mm Hex Pattern 15%  17.5130% 160% 90° 89 - 93%
G-GPHM2.4 mm Hex Pattern13%17.3  130% 160%90° 89 - 93%
G-GPHX 10 mm Hex Pattern 12% 17.2 130% 160%90° 89 - 93%
G-GH85 Smooth with LED hiding 13%  17.5135% 160% 85° 89 - 93%
G-GH85 + G-GPHM 2 Layer Solution9% 16.3 180% 75°85 - 91% 
Lambertian Source (provided for reference) 40%  100% 100% 120°  100%

Visual Appearance

Glare Control diffusers exhibit a variety of appearances depending on illumination conditions. They can be used in conjunction with C-Series diffusers to better hide light sources and further increase gain.

Usage Notes:

  • G-Series glare control diffusers must be flat to achieve glare control; they cannot be formed in curves around lamps
  • G-Series glare control diffusers must be used with the microstructure facing away from the LED or lamp
  • Helps luminaries meet ANSI/IESNA RP-1-04 and EN12464 glare standards for office/indoor lighting
  • Suppression of glare and efficiencies are typical; they vary greatly depending on luminaire design
  • Bright View applications engineers can assist with product choices and help your design achieve peak performance

1Optical performance including Glare, Gain, Angles and Efficiencies are typical; they vary greatly depending on luminaire design. Results shown were measured using a test fixture with lambertian light source in a goniophotometer.

2Protected by patent US9086521, other patents, and pending patent(s).

G-Series Appearance

G-Series Glare Control Diffusers Product Notes