System Downtime Notification
On Saturday, November 1, 2014 from 11:00 PM EST to November 2, 2014 7:00 AM EST, usgbc.org will be offline for site maintenance. Email us or call 1-800-795-1747 for assistance. Thanks for your patience.
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a luminaire classification system that classifies luminaires in terms of backlight (B), uplight (U), and glare (G) (taken from IES/IDA Model Lighting Ordinance). BUG ratings supersede the former cutoff ratings.