What is the BUG Method in LEED?

Sarah Ward's picture
Sarah Ward
August 1, 2014

Why did USGBC introduce the BUG Method into Sustainable Sites "Light Pollution Reduction" in LEED v4?


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Rob Freeman's picture
August 14
0 users voted0 users voted

Hi Sarah, the "BUG" method is an acronym for "Backlight Uplight Glare" and is new to LEED v4 and is referenced in Sustainable Sites (Light Pollution Reduction) for reducing "light trespass"... BUG classifies fixtures based on the likelihood of them creating light pollution. The BUG calculations are listed through IES-TM 15-11 Addendum A, Table A.

USGBC may have included the "BUG" Method to give project teams additional options beyond the LEED 2009 compliance route which uses a calculation, project teams can also use a "hybrid" approach of both the calculation option and the "BUG" option...

BUG looks at the compliance of a luminaire (aka a light fixture) with the backlight, uplight, glare framework. The BUG method may be more simple if the specs are available for all the fixtures according to BUG. But if some fixtures are not BUG rated, the hybrid approach could be the best path.

More info about BUG can be found at ies.org


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