Sealed Beam Lamp definitions

sealed beam lamp

a pressed glass lamp designed to give a closely controlled beam of light
Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=845-07-39

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Sealed Beam Lamp

A lamp where the reflector, filament, and lens are contained in one sealed package. Virtually unable to be focussed except for pointing in the right direction.
Found on http://www.encyclo.co.uk/visitor-contributions.php

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