Over the years, motion sensor lighting has taken on many roles. At one point, they were used solely for security purposes. As people began to realize that different lighting levels help conserve energy, this became more of the focus.
Last year, the International Code Council published the 2015 International Energy Conservation Code (IECC), a model energy code that states and other jurisdictions can use in whole or part as their energy code. Today, many states base their commercial building energy code on the IECC.