... to 10,000 hours lifespan Competitive price. Energy saving lamp Features:1. 2U.3U.4U.6U.8U. Half Sprial, Full sprial series and so ... , cuter appearance3. High light output and excellent color rendering4.Dramatic energy saving and longer life5. Flicker free strating operation6. T2.T3.T4 ... /E146. Optional Color Temperature: 2,700K/4,100K/6,500K Energy Saving Lamp Half Sprial