I saw these lamps being sold on ebay and decided to get one of each to compare them internally and externally. They use standard capacitive dropper circuitry (Even the 9W one!) and I have to say that they're all pretty neat. They rely on a very well ventilated structure for cooling, although this is slightly defeated by the closed front. The PCBs themselves are covered in airflow holes and the housing has a lot of ventilation slots that actually make it very stylish looking.
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DeathStroke BambuLab X1C #Shorts
DLG - FLITZ - soaring joy!