1. The B.U.G. Rating System Klaus Bollmann
President & CEO – Ringdale ActiveLED
Developer and Manufacturer of LED Light Fixtures
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2. The Original IES Classification System
The original classifications included full cutoff, cutoff, semi-cutoff and non-cutoff. These were designed solely around street lighting applications.
These designations were not accurate enough to meet the needs of projects in relation to light trespass, glare and night glow concerns.
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3. B.U.G. Ratings – Improved Evaluation Criteria
The BUG system was developed by the Illuminating Engineering Society (IES) to make comparing and evaluating outdoor luminaires fast, easy and more complete than older systems.
Work on the BUG system started in 2005 when the IES upgraded the original roadway shielding classification system.
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4. ActiveLED Update
The BUG acronym describes light escaping from an outdoor lighting luminaire in sectors.
“B” stands for backlight, or the light directed in back of a mounting pole.
“U” stands stands for uplight, or the light directed above the horizontal plane of the luminaire
“G” stands for glare, or the amount of light emitted from the luminaire at angles known to cause glare
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5. BUG ratings are not an absolute judge of a light’s requirements
ActiveLED Update
BUG ratings are not an absolute judge of a light’s requirements
B0-U0-G0 means there is no light above 60 degrees.
B1-U0-G1 is a rating typical for a commercial parking lot. It may be too dim for a large city center.
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6. Benefits of using the B.U.G. Rating System
Allows a specifying engineer to quickly determine the suitability of a light in respect of light trespass, glare or dark sky (up-shine) characteristics.
BUG ratings provide backlight output, glare information and indicates how well the luminaire controls uplight.
Presents an accurate picture of lumen distribution and overall efficiency of the luminaire
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7. Application of BUG ratings for Dark Skies
ActiveLED Update
Application of BUG ratings for Dark Skies
Bx-U0-Gx – Must have a “U” rating of “0” resulting in NO uplight
The appropriate glare rating is determined by the community.
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8. Application of B.U.G. Rating for Residential and Indoor Lighting
BUG does not apply to residential or indoor lighting.
The IDA Fixture Seal of Approval Program can be used to rate residential outdoor luminaires.
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9. Glare Control – Before and After
San Antonio, TX
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Two – 100 Watt ActiveLED Fixtures
Two – 1000 Watt Metal Halide Fixtures 9 9

10. Uplight “U” Value – With and Without
AFTER
BEFORE
“U” > 1
“U” = 0
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Acorn Historic Style fixtures with 32 Watt ActiveLED retrofits – 3000K
Cutoff Wall Packs and Pole Mounted ActiveLED Lights – 5000K
Southwestern University - Georgetown , TX
Capital Chevrolet - Austin , TX 10 10

11. Glare Control is better with LED
New
Old
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72 Watt
ActiveLED
Fixtures
400Watt
Metal Halide Fixtures
City of Brighton, CO 11

12. QUESTIONS? The B.U.G. Rating System Highlights:
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