Difference between revisions of "Low Pressure Sodium (Vapour) Lamp"
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Revision as of 10:01, 1 March 2009
2-3-355
A sodium vapour lamp in which the partial pressure of the vapour during operation is not above a few newtons per square metre.
Reference: C.I.E.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)