Light Filters: fluorescent light reduction

GR380 Transparent face pointing down: reduces light by about 35%

GR380 Partial blockage of light: reduces overall light output by about 40%

GR380 Substantial blocking of direct light: reduces light by about 45%

GR380 Black side facing down: reduces light by about 60%

Light Filters: Fluorescent light intensity filter
Detail image of sleeve

Ergomart Gradient Light Filters allow the user to control fluorescent lamps that are too bright in two ways. The sleeve dot matrix pattern graduates from transparent to opaque; the sleeve may be rotated to reduce the light output of fluorescent tube lights. The second major benefit is the user can actually direct light down, left or right. The opaque (black) side can be pointed downward to knock out about 75 percent of the light. We provide two performance levels of this product: STANDARD—simple UV filtering; PREMIUM—Full Spectrum / UV light filtering / glare reducing. 

For those who suffer from migraines, these products can reduce the frequency of or even eliminate migraine headaches for some. Both the standard and premium gradient filters reduce the amount of light emitted from a fluorescent lamp and therefore reduce the relative flickering effect in environments where there are secondary non-flickering light sources. The GRX380 has the added benefit of improving the quality of light.


GR380 T8, and T12 Sleeves
ergomart checkout  Made in the USA


Please call for shipping options to AK, HI, PR and International destinations or if you require expedited delivery.

GR380 UV Gradient Fluorescent Light Filters

Gradient Sleeves Reduce Light Output and Filter UV Light


  • Controls lighting levels & intensity
  • Direct light by simply turning the sleeve
  • Eliminates all UV below 380 nanometers
  • Not recommended for HO lamps
  • Choose T8 or T12 Sleeves in four-foot lengths
  • May reduce or eliminate migraines in some users
  • Free UPS shipping in the lower 48 United States
  • GR380-T8 1 - $35 each / 2 to 9 - $18 each / 10 to 23 - $15 each/24+ $12
  • Just $12 each when purchased by the case of 24
  • GR380-T12 1 - $35 each / 2 to 9 - $18 each / 10 to 23 - $15 each/24+ $13.04
  • Just $13.04 each when purchased by the case of 24



GSA Ordering and Price Information. Limited to GSA customers only. GSA buyers click here.


*AK, HI and PR Note: To determine shipping options, please contact us at 214 742 6066 or

**Canada/International Note: Listed shipping prices are for shipments within the lower 48 United States. International Customers ordering outside the US, please contact us for shipping options. 214 742 6066 or
Professional installation is recommended.

Popular Items Also Available From Ergomart
Monitor Arm
SAA2415 Heavy Duty Arm
Heavy Duty SAA2415

One of our toughest (yet attractive) LCD monitor arms! The SAA2415 floats big LCD monitors, LED displays, touch screens and even small flat screen TV monitors up to 62 pounds.

Mounts with
Keyboard Trays

Mounts with Keyboard Trays

Monitor Arms, Monitor Stands and Monitor Poles with Keyboard Trays fort LCD and LED screens

Light Filters

Visibility Ergomart

Ergomart offers an extensive lineup of fluorescent light filtering products. Our filters virtually eliminate all UV wavelengths below 380 nanometers. We offer several versions of these lighting filters that offer various levels of beneficial properties.

Wall Track Mount
Heavy Duty Track COMBO 2
Wall Track Mount

Our COMBO 2 Data Entry System is a true Sit Stand LCD and Keyboard Track Wall Mounted Solution that can be configured for ADA compliance. In its base configuration, the COMBO 2 has two articulating arms with more than 15.5 inches of vertical travel.

Keyboard Trays

Keyboard Trays

Ergonomic keyboard trays and keyboard arms combos provide precision keyboard and mouse placement for single or multi-user workstations. Work positions that are restricted to a single height are often inadequate.