LED Chip: EPISTAR Power: 3*1W Input Voltage: E27/E26/E17/E11/GU10: AC100-120V or AC220-240V MR16: AC/DC12V Luminous Flux: 180-200LM Color Temperature: Pure White: P1 4000-4500K, P2 5500-6200K Warm White: W1 2700-3200K, W2 3600-3900K Base: E27/E26/E17/E11/GU10/MR16 Material: Aluminum alloy Measurement: E27/E26: Φ50mm*73.6mm E17: Φ50mm*70mm E11: Φ50mm*65mm GU10: Φ50mm*56mm MR16: Φ50mm*50mm 2 years quality warranty with CE,ROHScertificate