Hotel Room Lighting Exceptional Calculation

We would like to apply the exceptional calculation method for guest room lighting in a 165-unit hotel. About one third of the guest room areas are hardwired with permanently installed, switched lights. The remainder of the space is lit via lamps directly connected to wall outlets. We are proposing to calculate the Baseline model using the ASHRAE 90.1-2007 lighting power density (LPD) of 1.1 Watts/square foot. The Proposed model will calculate one third of the area at a high performance LPD, and the remaining two thirds of the area at 1.1 LPD. Our hope is to capture this energy savings in a manner that would be acceptable to the LEED reviewers. We have used this approach per Energy Star Multifamily protocol in the past. Has anyone out there had experience with this approach? Is it worth attempting or is it a lost cause? Many thanks!