2U Energy Saving Lamp 1). Wattage: 5W,7W,9W, 11W, 13W, 15W 2). Voltage: ... needed3. Up to 75% energy saving.4. Ten times the lamp life of standard incandescent lamp5. Excellent color rendering, excellent light ... position.8. Color temperature options: warmwhite, coolwhite, and daylight.9. Operating voltage: 220-240V/50Hz , 110-130V/60Hz