Features: Equal light distribution Saves 80% energy compared with incandescent lamp Long lifespan and economic Tri-phosphor, nice cri to display original color of objects Lead-free glass tube Tender light, flicker-free and eye protection Excellent consistent quality Designed for various residential and commercial lighting Specifications: Power consumption: 7 to 18w Tube diameter: t3 Voltage: 110 to 130 or 220 to 240v Frequency: 50 to 60hz Optional base: b22, e27 and e14 With 100% tri-phosphor powder Color temperatures: 2700 to 6500k Color rendering index: Power factor: 0.52 or 0.92 Appearance: full spiral Average lifespan: 6000 or 8000 hours Quality guarantee: 1 year Packing: color, blister box with outer corrugated box. 515x250x150mm per carton, 4.7kgs gross weight per carton.