Grey Scales are used for assessing Change in Colour, and Staining.
The correct lighting for assessing colour change and staining is D65.
The LED currently installed in ProView is simulated Cool White.
This is correct for the assessment for pilling and snagging.
Presently there is not an interchangeable bulb setting on ProView and so assessment of Change in Colour and Staining would not be possible.
James Heal is currently looking into the possibility of an interchangeable bulb.
A PDF version of this FAQ is available for reference.