metallic-additive lamp

Also found in: Dictionary.

metal halide lamp, metallic-additive lamp

An electric-discharge lamp in which the light is produced by the radiation from a mixture of a metallic vapor (e.g., mercury) and the products of the dissociation of halides (e.g., halides of thallium, indium, sodium, etc.).
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.