A vertical flicker factor reading should be taken at a height of 1m on the 90° and 270° planes at each of the six positions indicated in Flicker factor test reference points – 12point highfrequency test
The 12point average is calculated by dividing the sum of those 12 values by 12.
The maximum flicker factor value is the highest measured value of the 12 points.
The maximum permitted flicker factor is listed below for each UEFA level.
Flicker factor requirements 


Elite level A 

12 or 24point average 
<3% 

Maximum value 
<3% 

Level A 

12 or 24point average 
<5% 

Maximum value 
<5% 

Level B 

12point average 
<12% 

Maximum value 
<15% 

Level C 

12point average 
<20% 

Maximum value 
<30% 