Even I had same issue have enough brightness but it is taking lil blurred image for me and for my wife also , so we ended up what ever the best we can .I struggled to get a clear picture of my ID at the citizenship test, it doesn’t matter how quality my web (HD) cam and room brightness is, I had to request for the test link couple of times coz I couldn’t start the test within 15 mins.
Somehow managed to get a lit bit better pic and I just uploaded it and began the test (scored 20 out of 20).
I am afraid that they will ask me to re-do the test
Congrats for 20 , even we got 20