Energy

Designing homes to conserve energy and use it efficiently, from sources that cause least environmental harm.

Lighting design

For maximum energy efficiency, homes should be designed to make the most of natural daylight.

Lighting accounts for 11% of energy used in an average New Zealand home, and that percentage is projected to increase in coming years.

For maximum energy efficiency, homes should be designed to make the most of natural light during daylight hours.  See daylighting for details.

However, artificial lighting is necessary for times when natural lighting is not available/adequate and for specific tasks. Artificial lighting especially using LED fixtures can be designed to provide appropriate lighting levels while using energy efficiently.

A report commissioned by EECA calculated that LEDs can save householders $75 per lamp over their lifetime compared to using incandescent bulbs. The net savings to New Zealand from reduced peak electricity demand are even higher, at $150 per lamp. Yet LEDs only made up an estimated 20% of the residential lighting stock in 2015. There is a significant opportunity for energy efficiency gains.

 

Updated 03 April 2018