Difference between revisions of "High Pressure Sodium (Vapour) Lamp"
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Revision as of 12:00, 25 February 2009
2-3-360
A sodium vapour lamp in which the partial pressure of the vapour during operation is of the order of 104newtons per square metre (0.1 atmosphere).
Reference: C.I.E.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)