For this Specifier Report, NLPIP tested lighting circuit power reducer products for single-phase fluorescent lighting systems from three manufacturers. The report also includes information on products for high-intensity discharge (HID) lighting systems, although NLPIP did not test these products. Lighting circuit power reducers are retrofit devices designed to reduce the energy use of a lighting circuit. These power reducers, also called lighting controllers, are installed at electrical panels between a circuit breaker and the lighting load to reduce the active power of the entire lighting circuit. Reducing the lighting load, however, reduces illuminances and may also reduce system efficacy. Manufacturers may claim that lighting circuit power reducers save energy without a perceptible reduction in light output, but there are few test data that support these claims. |