High Pressure Arc Discharge Lamp

From International Dictionary of Marine Aids to Navigation
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2-3-415

An arc lamp in which the discharge takes place in a gas or vapour at a pressure above atmospheric. Almost all the emitted light originates from the arc itself.




Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM