... (9-10mm), 110-230V, 2700K/4000K/6500K, 8000H high quality. half spiral energy saving lamp:Power: 9W, 11W, 13W, 15Wtube diameter: T3 ... (9-10mm)Color temperature (K): 2700K, 4000K, 6500KBase: E14, E27, B22Voltage: 110-130V,220-240VAverage life: 6000/8000/10000 hoursHigh ... assurance system. We have CE&EMC, RoHS and ISO9001 certifications. half spiral energy saving lamp