Certified Energy Auditor Practice Exam

Implementing reflectors in lighting systems is a significant modification that can enhance efficacy. Reflectors improve the distribution of light, directing more of it where it is needed. By increasing the efficiency with which light is projected, reflectors can help reduce the number of fixtures or the wattage needed to achieve the desired lighting level. This modification leads not only to better illumination but also to lower energy consumption, contributing to overall energy efficiency.

Using dimmers, while allowing for adjustable brightness, does not intrinsically increase the overall efficacy of a lighting system; it merely moderates the amount of light output based on needs. Choosing lower wattage bulbs can reduce energy consumption, but it may not necessarily enhance efficacy since efficacy is measured in terms of light output per watt and a lower wattage may not equate to higher efficiency if it results in less light. Switching to incandescent bulbs typically results in lower efficacy compared to modern alternatives like LEDs, as incandescent bulbs are less efficient at converting electrical energy into visible light.