We are owrking on a project on previously developed land that we have established as complying with IESNA LZ2. The surface parking for the project runs along the Southern edge of our site, which abuts a municipal roadway with existing street lighting. Our full cut-off fixtures, with sheilding are located such that the horizontal fc at the curb line is less than .1 fc - great!. But what is frustrating us is that we have 2 instances of “hot spots” at 10 feet beyond the curb line of as much as .01 fc. The areas are located behind the fixtures, and are no more than 25-30 feet wide. We have looked at different alternative combinations of lowering the fixture mounting height and reducing lamp wattage, but the model is not significantly affected by the variations. We understand that SS-8 is a tough credit to meet, and we think that we are complying with the spirit, if not the letter, of the intent. We are hoping that you can shed some light on this conundrum. Any suggestions on how we might be able to either meet the .01 fc @ 10’, or make a convincing argument to the reviewer?
Thanks!