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A parabolic aluminum reflector lamp, which offers excellent beam control from a very narrow spot to a wide flood. PAR lamps can be used outdoors unprotected since they are made of hard glass that can withstand adverse weather.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved
reflector lamp, usually incandescent, with a thick glass envelope, the back interior side of which has a parabolic shape with a reflective coating; used with a lensed front of the envelope to provide desired spread of the light beam.A
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.