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JA8
JA8/JA10 is the test method described by California energy commission in title 24. This method
uses the fluctuation of light from the lighting system and processes the signal to quantify the
flicker percent below a given cut-off frequency. Signal processing is used to remove high
frequency components above the cut-off frequency.
PstLM
PstLM is a short-term flicker indicator measured with a light flicker meter and is designed to
measure in the range from ~0.1hz to 80hz.
The PstLM measurement is 180s measurement and is implemented according to:
IEC TR 61547-1:2017
The PstLM values in general can be read as:
PstLM <= 1, Good
PstLM > 1, Bad
As mentioned is the PstLM measured over a period of 180 seconds or 3 minutes so it is therefor
important that the flicker device is held still during this period. The LabFlicker should therefore
be placed on a table or stand in front of the lamp being tested.
Generally, is it always recommend to have the LabFlicker in an still position during all types of
flicker measurements.
