A proposed change to the International Energy Conservation Code (IECC) based onASHRAE's energy efficiency standard would provide more design flexibility while promoting energy efficiency. ASHRAE submitted nine proposed changes for the IECC based on ANSI/ASHRAE/IESNA Standard 90.1-2001, Energy Standard for Buildings Except Low-Rise Residential Buildings. One of the changes would strengthen some of the language and add prescriptive requirements in the section on exterior lighting. The existing section only applies a generic and relatively low efficiency requirement for all lamps, regardless of type or size, with no limit on the quantity of exterior lighting.