Refer to the ASHRAE tables to figure out your lighting power allowances by building and space type (tables 9.5.1 for building type and 9.6.1 for space type). For each building or space type there is a corresponding LPD in the table.
For EAp2: Minimum Energy Performance, you have to hit a target of 10% lower LPD than the ASHRAE 90.1-2007 lighting allowance. For this credit, you can earn points starting at 15% reduction for one point, and in 5% increments up to 35% for 5 points (plus an Exemplary Performance point at 40%, via IDc1).
Start brainstorming strategies for innovation credits early in the process, and involve your entire team, including building operators, property managers, owners, occupants, and building vendors.
Select the materials for your roof, and revisit your roof surface area calculations to ensure that you are still meeting the requirements for a light-colored, green, or combination roof.