The government introduced the lighting energy numerical indicator (LENI) to minimise luminaire lumens per circuit watt. However, it is an alternative not a replacement to technology requirement. The Lighting Industry Association describes LENI as an initial positive proposal.
The failure to include a calculation of energy saving for preset lighting control is considerable omission. The LENI is an important supplementation. It is an index indicating the energy used by a lighting system per square meter, per year.
Meanwhile, a proposal for increasing minimum number of luminaire lumens per circuit watt from 55 to 60 has also been introduced. Lighting will remain part of the overall categorization of a building as a whole.
Syntegra Consulting can provide you a variety of services including building energy audits, daylight calcs, LED lighting design and feasibility studies, and full M&E design consultancy.