It is a big challenge to make sure that only the lighting needed for each mode of space usage is turned on. For example, if a nightclub has fluorescent lighting for cleaning, make sure that the incandescent lights are turned off when the fluorescent lights are turned on. Otherwise, the money spent on the extra fixtures is wasted and overall consumption may even increase.
An important requirement is to have efficient switching for the fixtures. To achieve this, the fixtures must be arranged properly on the power circuits, as prescribed by Measure 9.6.4. In order for the switches to be used properly, they must be located where they are accessible and obvious, as prescribed by Measure 9.6.4. And, the controls must be marked in a manner that is effective for its environment, as prescribed by Measure 9.4.1.
One way to keep the wrong lights from being turned on is to install a programmable light switch that turns on preset patterns of fixtures tailored to the different activities. See Measure 9.6.4.1 for the details.
A foolproof method is to install a transfer switch between lighting circuits that feed different types of lighting. For example, you could put all the incandescent lighting on one circuit, and all the fluorescent lighting on the other. See Measure 10.4.1 for details. The disadvantage of this method is that you can never operate both groups of fixtures at once.
See Subsections 9.4 and 9.5 for other control techniques that customize lighting to the nature of the activity. Methods that involve manual switching are inherently unreliable. They depend on effective placards (see Measure 9.4.1) to produce a significant benefit.
While you are planning this Measure, review Measure 9.6.4 about control circuits. As you install the wiring for the new fixtures, improve the control wiring of the existing lighting, if appropriate.