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Driver-free COB light delivery Power: 20W/30W/50WColor temperature: 3000K/6500K/full spectrum 380-840nmInput voltage: AC220VLight efficiency: 80-90LM/WPower factor: PF≥0 surface: 25*25mmOuter diameter: 60*40mmScrew hole distance: 34*34Color rendering index:70Luminous flux: 4500 (lm)Substrate material: common aluminum substrateLighting angle: 140°Weight: 10g/piece