Peter Erwin’s Der Lichtpeter
flicker-tests a large number of lights available in Germany using professional equipment
LEDBenchmark
flicker-tests lights available in Australian shops
Silas S. Brown’s lighting notes
(some UK-bought products, person with flicker sensitivity and cellphone camera) (site also has notes on the advantages of dark mode and how to get it on some web browsers and other software)
IEEE 1789-2015
is a recommended (but sadly not enforced or widely labelled) standard about reducing flicker in LED lights