
Specification for high-pressure sodium vapour lamps
出版:British Standards Institution

專家解讀視頻
Definitions, marking, dimensions and lamp caps and requirements for lamp starting , warm-up and electrical characteristics. Some information is given for ballast, ignitor and luminaire design. Only 250 W and 400 W with clear tubular or diffuse elliptical bulbs are covered.
? British Standards Institution 2013