UNE-EN 60662:2012/A11:2019 High-pressure sodium vapour lamps - Performance specifications (Endorsed by Asociación Española de Normalización in March of 2019.)
2019UNE-EN 60662:2012/A11:2019 High-pressure sodium vapour lamps - Performance specifications (Endorsed by Asociación Española de Normalización in March of 2019.)
2012UNE-EN 60662:2012 High-pressure sodium vapour lamps - Performance specifications (Endorsed by AENOR in July of 2012.)