The exterior lighting power density (LPD) and uplighting requirements for SSc8 should be met in their entirety. In order to achieve the credit, project teams should comply with the LPD and the uplighting requirements independently. Substantial reduction in the percentage of total allowable LPD for exterior lighting does not compensate for, or warrant, an exemption from the reduced uplighting requirement for each zone. The purpose of reducing the uplight is to limit the amount of light emitted at an angle of 90 degrees or higher from nadir (straight down). Applicable Internationally.