Difference between revisions of "Extra High Pressure Mercury (Vapour) Lamp"
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Revision as of 12:00, 25 February 2009
2-3-375
A mercury vapour lamp in which, during operation, the partial pressure of the vapour reaches a very high value, of the order of 106 newtons per square metre (10 atmospheres) or more.
Reference: C.I.E.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
