... SGS ISO9001 2.life time 6000h 3.saving 80% energy 4.manyyears OEM experien full spiral energy saving lampsSpecification:1,diameter: 9mm2, voltage: 110v ... inside ,instant start ,noise and flicker free6.Tri-phosphor fluorescent tube ,high color rendering index.Application:Home, Offices, Shops, Department Stores ... packing design and seri number before production . 11w full spiral energy saving lamps