... 277V 3years warranty >50,000hrs UL 15W U shape led tubes Product Name: UL 15W U shape led tubes Model: GL-15W/TX2-01Operating ... Better heat dissipation for tubes;2. External Drivers, Better quality, Longer life than internal drivers;3. External drivers and ... drivers, more convenient for maintenance than tube with internal driver;4. External Drivers, high lighting efficiency. more energy-saving.5. ...