Office buildings: According to the 2009 Buildings Energy Data Book published by DOE, the average large office building (>25,000 square feet) has a lighting power density (LPD) of 1.3-1.8 watts/sq.ft. (based on 2006 data), while the average small office building has a lighting power density of 1.7-2.2W/sq.ft. If these buildings were relighted to simply comply [...]





