I don't know much about this LED but it use about 30V to drive and I design CC drive for it. The white LED usually got Vf about 3V. My lamp got 90 LEDs on it, so I assumed the schematic look like this (10 LED in series x9 in parallel). Why we can use LEDs in parallel in this situation? I remembered we should not parallel the LEDs.
- Vf of LEDs can be difference.
- Temperature make VI curve changed.
Note: This schematic is just my assumption. If you has real schematic please share.