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10w high power led chip: 10W LED chip size:29mm * 20mm (small) Color temperature:warm white (2800-3500K) white (6000-6500K) Luminous flux: 90-110lm/W Forward current:850-900mA Driver voltage: 9-12V Integrated scheme: 3 in series, three in parallel 20w 30w 50w 100w high power led chip: 20w 30w 50w 100w LED chip size:52mm * 40mm (big) Color temperature: warm white (2800-3500K) white (6000k-6500K) Luminous flux: 90-110lm/W Foward current: 20w (600mA) 30w (900mA) 50w (1500mA) 100w (3000mA) Driver voltage: 30-36V Attention:It must need a warmth sink aluminum for cooling, do not gentle it without warmth sink aluminum