Specifications: 1) High luminous efficiency 2) Instant start, flicker free 3) Save 80% energy 4) Color temperature for option (2700K, 3200K, 4100K, 5500K, 6400K) 5) T5, T9 circular tube 6) UL approval, UL certificate no.: E243260 7) 30W, 40W for option 8) Voltage: 110-130V 9) 8,000 hours working life time 10) Suitable for table lamp 11) Patented products, patent no.: ZL 012253294