We have to document that, for LZ2, max. 2% of initial fixture lumens are emitted at an angle of 90 degrees of more from nadir. In your experience how would you achieve this?

We are working on a rural site which will be classified as LZ1, so will not be allowed any light to be emitted above 90 degrees from nadir.

I plan to get the this credit through simulation. I heard that DIALUX seems can get it, but I am not so sure. Please help me and tell me if I plan to get this credit though simuation, Which softwar

If there is an existing lighting within the lighting boundary (in our case lighting of the parking lot), should this be included in the assessment, or not?

Can compliance with the following requirement also be documented by proving (through interior lighting contour drawings) that less than 10% or the initial fixture lumens will be transmitted through

We are building a hotel with LEED NC v2009.

It seems like most bollard lights emit light straight out to the sides at 180 or 360 deg spreads. Therefore allowing a lot of light to be emitted above 90 deg from nadir.

Has any one worked on/heard of a hotel project that was able to achieve this credit?

We are working with an office building which has requirements for providing working stations between 11 pm and 5 am.

We are trying to achieve this credit, I have 2 questions; - The municipality has few lighting off our site limit but very close to our LEED boundary.