planoconvex spotlight

planoconvex spotlight

[¦plā·nō′kän‚veks ′spät‚līt]
(electricity)
A light that can be used as a sharply defined spotlight or for soft-edged lighting; ranges in power from 100 to 2000 watts.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.