Indoor lighting in residential and commercial buildings significantly contributes to global energy as well as peak demand. Efficiency gains in lighting can deliver substantial energy savings, while allowing access to and improved quality of energy services in developing countries. Lighting is, therefore, an essential target for demand-side energy efficiency initiatives due to its relevance and cost-effectiveness. The light-emitting diode (LED) is today's most energy-efficient and rapidly-developing lighting technology. In 2019, LED sales reached a critical milestone, achieving a record number of sales of more than 10 billion units, encompassing the whole luminaire (i.e. bulbs, tubes and modules). Both residential and commercial LED deployment is advancing, and LED sales now exceed fluorescent lamps.
In a hypothetical situation in which the efficiency of all new indoor lighting sold globally doubled from 2022 onwards, the potential global annual electricity reduction by 2030 could be 1200 TWh, resulting in approximately 550 MtCO2 emissions reductions. Under the same hypothesis, SEAD member countries alone could save over 800 TWh, resulting in almost 400 MtCO2 energy-related emissions avoided in 2030.
There is an opportunity to limit the energy demand growth of indoor lighting through efficiency policies such as more stringent minimum energy performance standards (MEPS) and labelling. To date, 89 countries worldwide have minimum efficacy requirements for lighting products and 61 countries use comparative labels. MEPS now cover up just over 75% of global energy use for lamps, an improvement of more than 30 percentage points since 2010. Additional mandatory lighting policies are currently under development in several countries in Asia, East Africa, Latin America and the Carribaean.
MEPS and label levels have recently been updated, in the EU, where new minimum thresholds come into force in September 2021. Further scheduled updates in 2023 will phase out most halogen lamps and the traditional fluorescent tube lights, which are common in offices. Labels will also be rescaled from A (most efficient) to G (least efficient) and include a QR-code that links to more information in an online database. South Africa is planning to raise MEPS for general service lamps to 90 lm/W in 2022.
To support the growth of markets for efficient appliances, the SEAD Initiative has developed the Energy Performance Ladder framework, which brings together multiple policies under a single consistent set of performance thresholds. These Ladder ‘steps’ are defined as energy performance levels using a standard test procedure. Governments can then set policy thresholds (such as MEPS, labels and high energy performance standards or HEPS) at different steps, as well as years in which the thresholds will move up the ladder.
The Ladder then provides a framework that can:
Illustrations of Energy Performance Ladders with current and planned MEPS levels for industrial electric motors are depicted below.
An illustration of the Energy Performance Ladder for indoor lighting is depicted below. General Service Lamps (GSLs) current market and proposed future polices are represented for 2021, 2023 and 2016. For each Ladder step the MEPS, standards and HEPs are defined based on the efficacy of the bulb (lm/W).
Indoor lighting is one of the four priority product categories of the COP26 Product Efficiency Call to Action.
SEAD supports public-private coalitions to deploy high efficiency, high quality appliances around the world by gathering commitments from policymakers, private industry, expert groups. The Global Lighting Challenge is a campaign to deploy 10 billion high efficiency, high quality lighting products. Since its launch, the GLC built a volunteer coalition with more than 60 governments, manufacturers, retailers, and expert groups working together to accomplish its 10 billion product goal. It was originally designed to last two years.
Visit the Global Lighting Challenge page for more information.