The FAQs describes that the vertical footcandles needs to be measured at ground level. In my opinion, it is not true. Reference guide NC v3 describes that "Calculate the vertical light levels alon

If you're having trouble knowing exactly how much uplight the light fixtures on your site are emitting there is a simple free tool for converting an IES file into an output that will display upligh

This note is for CALGreen but thought I'd share anyway. The Light Pollution credit under CALGreen is now considered voluntary until July 1st.

Our project does not have any lighting on a non-tradeable surface and as a result, we cannot achieve credit compliance. How do I handle the input block for non-tradeable surfaces? Thanks!

Our Project has a LEED boundary that crosses a parking lot. This means that half of the parking lot is within the leed boundary and the other half is outside the leed boundary.

Hej! Our building is in LZ3 and Lighting Power Allowance for facades is 0.15W/ft2 for each illuminated wall .

Is there any exception to a project that would only be used 12 times a year (1 time per month) past the 11pm time line for interior lighting levels?

Has anyone found an answer to the questions regarding line of sight and angles it covers..?

Does anyone know of a manufacturer that makes a parking lot lighting fixture that casts light in only one direction, instead of 2 or 4 directions?

Good morning, I wonder how i should account a WAter fountain in the exterior of my building. It is like this one: http://www.hidroworks.com/galeria.php?id=2 .