C405.2.4.1 Daylight Responsive Controls Function
Where required, daylight responsive controls shall be provided within each space for control of lights in that space and shall comply with all of the following:
Daylight responsive controls shall be configured to automatically reduce the power of general lighting in the daylight zone in response to available daylight, while maintaining uniform illumination in the space through one of the following methods:
General lighting within daylight zones in offices, classrooms, laboratories and library reading rooms shall use the continuous dimming method. Stepped dimming is not allowed as a method of daylight zone control in these spaces.