I've been reading and re-reading the interpretations by USGBC and the posts on this site and I still feel like I can't positively state the answer to the following question our team has: Can the LE

What is the height off the ground at which the vertical Fc are are to measured at the property line?

Hello, When calculating the number of lumens emitted at or above 90 degrees from nadir, is it possible to disregard the lumens that are shielded by the building its self / are not emmited directly

Our project has issues with the lighting on one of the facedes that exceeds the LPDs per ASHRAE.

I've looked at the annotated photometric plan example for this credit, and I noticed that at the project boundary, the vertical and horizontal footcandle values are reported as one single value. D

If we find the right kind of light fixture to be installed in the parking lot which can work well with an occupancy sensor, we will be able to reduce a lot of exterior light pollution for our proje

GBCI brought to my attention a correction that needed to be made to our FAQs.

We have insulated, translucent daylighting panels on the project, and I'm wondering if they will be considered "windows" for the interior lighting requirements of this credit.

Our project is a new building being built on an existing campus.

Hello All, I have a project that is required to meet its own jurisdictional dark sky ordinance.