... power ,tri-color ,luminous flux 1400lm 3.80% energy saving 4.Longer life Energy saving lamp 4u Specification:1.voltage and frequency :100-130v or 220 ... 's reqirements .Superiority :1.High luminous efficiency : 1 piece of energy saving lamp equal to 5 pieces of incandescent bulbs ,for example ,2 ... . Application :suitable for home ,school ,library ,hospital ,market and factory . 4U energy saving lamp