How does energy-efficient lighting impact a home's HERS rating?

Energy-efficient lighting significantly contributes to reducing a home's energy demands, which directly affects its Home Energy Rating System (HERS) rating. When a home is equipped with energy-efficient lighting, such as LED or compact fluorescent bulbs, it consumes much less electricity compared to traditional incandescent bulbs. This reduction in energy consumption lowers the overall energy usage of the home, which is a key factor in determining the HERS index score.

A lower HERS index score signifies better energy efficiency, as it indicates that less energy is required to maintain the same level of comfort and functionality within the home. Therefore, the use of energy-efficient lighting not only enhances energy efficiency but also contributes positively to the home's overall rating in the HERS framework. These improvements can potentially lead to lower utility bills and a smaller carbon footprint, highlighting the importance of energy-efficient lighting in a home's design and operation.