tl;dr: just pure insanity! Over 13000 lumens of just pure white light, with extremely low voltage!
More in my detailed test.
English: https://budgetlightforum.com/t/led-test-review-changda-sfh55-6500-k-70-cri-just-pure-insanity/225575
German: https://www.taschenlampen-forum.de/threads/led-test-review-changda-sfh55-6500-k-70-cri-mehr-leistung-geht-kaum.94109/
by koef3
