an apparatus by which practically all the light from a lighthouse lamp or the like is thrown in a desired direction.
Origin of holophote
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for holophote
Historical Examples of holophote
The focus observer is shown on the lamp in holophote, Fig. 172.
The catadioptric lens, or holophote, gives a far more powerful but a more concentrated beam than the parabolic reflector.