ceiling light

ceiling light

[′sē·liŋ ‚līt]

(engineering)

A type of cloud-height indicator which uses a searchlight to project vertically a narrow beam of light onto a cloud base. Also known as ceiling projector.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

ceiling light

A borrowed light, 1, horizontally located in a ceiling to provide light below.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

ceiling light

A device to determine the height of clouds at night. It consists of a powerful projection lamp (searchlight) and a ceilometer to measure the angle of elevation subtended by the lamp beam. During the day, a ceilometer is used for this purpose.

An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved