If I understand the LEED requirements for exterior lighting, we will be following the BUG guidelines for all lighting that will remain on from sunset to sunrise.

Am I missing something or does v4 no longer have any requirement on interior lighting that has a significant uplighting component? We have an interior atrium that will have this issue - and it jus

I just had this come up on a project. The reviewer will only allow me to count hardscape area for the LPD table if that area has over 0.2 fc.

Is existing lighting required to be included in the BUG rating prescriptive method? We have a project where only some site lighting is being upgraded; the rest will remain.

I saw a similar question regarding uplight, but is it possible for a building-mounted light fixture to be excluded from the glare requirements if it is shielded from the lighting boundary by anothe

This has come up on a project and we lost on appeal so I'm sharing this information with everyone. Any area being claimed in the wattage baseline calculation must be illuminated to a minimum light

Hello all, In this project in Taiwan (I cannot find the country selection below), there are no available IES files nor BUG ratings for the exterior luminaires; therefore, I am pursuing the credit

The v4 light pollution requirement does not specifically mention that a project must "only light areas required for safety and comfort" as is stated in the v2009 credit language.

Has anyone had success trying this out yet? Not sure how complicated it will be.

Is there maximum allowable LPD for an electrical substation?