This model regulation guideline is a supplement to the UN Environment Programme’s (UNEP’s) United for Efficiency (U4E) Lighting Policy Guide “Accelerating the Global Adoption of Energy-Efficient Lighting.”1 and is a revision of the first Model Regulation Guideline published in May 2018. It is intended for use by regulatory authorities in developing and emerging economies2 that are considering a legislative framework3 to promote energy-efficient lamps, or those that have a legislative framework but have not yet developed regulations for energy-efficient lamps.