Hi Bill - Perhaps you can help me with this. The RG states a requirement of 200 cd/m2 (nits) for nighttime hours and 2000 nits during daytime hours for Internally Illuminated Exterior Signage.

Is there a definition of nightime hours for internally illuminated signage? I would assume midnight to 6 AM as in the excemption for facades but I can't find any statement.

We are working on the LEED V4 certification of a project which will be located at the border of a business park and about 3 kilometers away from highways and an international airport.

Hallo Bill, The Reference Guide mentions "Software is also available that will calculate the BUG rating using the IES file for the luminaire." Would you please share with us what software the guid

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.

Would appreciate very much if anyone can clarify that the maximum allowed percentage of total lumens emitted above horizontal (by lighting zone) is applied to each luminaire or the sum of all lumen

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

Working on a project where the property line is adjacent to a railroad track operated by a private railway company(BNSF).

Is there any circumstance whereby an after hours manual override for a Civic Building would not be acceptable for exterior lighting?

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