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Power: 20W/30W/50W20W Voltage: DC75-78V30W Voltage:DC105-110V50W Voltage:DC150-155VCurrent: 250-300mA20W Lumen:2000lm30W Lumen:3000lm50W Lumen: 5000lmDisplay value: Ra ≥ 7020W Series parallel connection:2B25C30W Series parallel connection:2B35C50W Series parallel connection:2B50CCrystal length contained within the lamp bead: 10 * 21mil20W Number of crystals contained within the lamp bead: 5030W Number of crystals contained in the lamp bead:7050W Number of crystals contained in the lamp bead:100Material: Aluminum