Recommended · for some experience
Testing dodgy 100W LEDs from ebay sellers.
Why people recommend it
A bigclive video on white LEDs that explains why some packages contain several junctions in series and raises doubts about the quality of cheap sourced parts.
Watch for: Useful when choosing a supplier for high power LEDs
In their words
See [video] - might be some QC issues there.
Bob on electronics.stackexchange.com, Apr 2016. CC BY-SA.