Abstract In the European Union (EU), mandatory durability ecodesign requirements have
recently been set for some products, including lighting products; further development of
durability standards is also expected in the future. Durability standards can bring
environmental and consumer benefits, but the question remains about what optimal
durability is. In this paper, the product lifetime aspect of durability is considered, and optimal
lifetimes in relation to least life cycle cost (LCC) for the consumer are analysed. The paper …