Mixed Powder&pure copper wire High luminous efficiency, Up to 80% energy saving Excellent color rendering 1) rated voltage:110V-250V, wattage: 9w,15w, 35w Tube diameter:9mm,12mm,14.5mm2) High luminous efficiency, Up to 80% energy saving3) Excellent color rendering, nice light distribution4) Up to 6,000 hours lifetime5) Flicker free6) Applications: suitable for factories, roads, squares, docks, ...