I am working on a stadium project where the main concourses are exterior and tucked under the seating bowl; within the concourse are restrooms, concessions, etc. Some of the enclosed spaces within the concourse are conditioned; most are not. All of these enclosed spaces are zones in my energy model with interior LPDs, but the concourse is not because it is an unenclosed space, completely open to the outside. My question is regarding the lighting within the concourse, and whether or not it would be considered interior or exterior lighting. There isn't category in ASHRAE 90.1-2007 Table 9.4.5 that applies to this type of "exterior" lighting. I'm tempted to put them under Plaza Areas / Walkways 10 ft or greater, but I'm not sure if this is the right way to go. Thanks for any input!