lamp depreciation

lamp depreciation

[′lamp di‚prē·shē‚ā·shən]
(electricity)
The decrease in amount of light emitted by a lamp during its operating life.

lamp depreciation

The decrease in luminous output of a lamp during its operating life.
References in periodicals archive ?
And if you anticipate greater lamp depreciation with LEDs than HPS lamps, how meaningful is this study?
Again, if the lamp depreciation cited in the article is true, won't the lighting levels fall below IES Handbook recommended levels rather soon?
Halide also has lamp depreciation, "which means that even though it lasts several years, after about a year you only have about 60% or 70% efficiency.