A method of selection of an illuminator for use in an accelerated light
stability test device chamber is described that employs measuring and
comparing the spectral irradiance of at least one light source for use in
an illuminated device and at least one illuminator suitable for use in an
accelerated weathering chamber and selecting an illuminator having
certain irradiance criteria. Also described are methods of accelerated
light stability testing of an illuminated display components and an
accelerated light stability tcst device.