DIN EN 60662:2019-12 高压钠蒸气灯 - 性能规格(IEC 60662:2011,已修改)
High-pressure sodium vapour lamps - Performance specifications (IEC 60662:2011, modified); German version EN 60662:2012 + A11:2019 / Note: DIN EN 60662 (2013-03) remains valid alongside this standard until 2022-02-04.