To provide a standardized test method that can be used for a valid comparison of luminance time curves, color changes and cosmetic changes between lamps of various designs, fabrication techniques, and sources.

1. Scope

1.1 This test method establishes the procedures for determining the visible performance change, which is defined by luminance, color and cosmetic appearance of an electroluminescent lamp during operation over an extended time.

1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

F1595 Practice for Viewing Conditions for Visual Inspection of Membrane Switches

F2359 Test Method for Determining Color of a Membrane Switch Backlit with Diffuse Light Source

F2360 Test Method for Determining Luminance of a Membrane Switch Backlit with Diffuse Light Source

Keywords

aging; electroluminescent; luminance; time to half luminance; Aging; Ambient conditions; Electroluminescence; Luminance ;

ICS Code

ICS Number Code 17.180.20 (Colours and measurement of light)

Citing ASTM Standards

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