What is a common method for enhancing energy efficiency in lighting systems?

Implementing LED lighting stands out as a highly effective method for enhancing energy efficiency in lighting systems. LED (Light Emitting Diode) lights are known for their low power consumption compared to traditional incandescent bulbs, which heat up more and waste energy as heat rather than light. LEDs use significantly less energy to deliver the same amount of light output, resulting in lower electricity bills and a reduced environmental footprint.

Additionally, LEDs have a much longer lifespan than incandescent bulbs, which means they require less frequent replacement. This longevity contributes to reduced waste and further energy savings associated with manufacturing and disposing of lighting fixtures. The improved energy efficiency of LEDs not only benefits individual users by cutting costs but also supports broader sustainability goals by reducing overall energy demand.

In contrast, other options listed in the question do not provide the same level of energy efficiency benefits. Using incandescent bulbs directly contradicts the goal of energy efficiency since they consume far more electricity and have a much shorter lifespan. Reducing the number of lights in each room may decrease energy consumption to some extent, but it can also lead to inadequate lighting, impacting functionality and comfort. Installing additional light fixtures generally increases energy usage rather than enhances efficiency, as more fixtures lead to higher overall electricity consumption.