... 100-130V, 180-240V3. Frequency: 50/60Hz4. Optional tube shape: 2U, 3U, 4U, half spiral and full spiral5. Optional color temp.: 2700K ... , 4200K, 6400K6. Optional lamp base: E14, E27, E40 and B227. ... Average life time of 6,000hrs, 8,000hrs, 10,000hrs available Energy Saving Lamp