Item Tube length Tube diameter LED qty Power Luminous flux YL-T8-60-SMD-2 60cm 30mm 108 7W 590LM YL-T8-120-SMD-2 120cm 30mm 216 14W 1080LM YL-T8-150-SMD-2 150cm 30mm 270 18W 1350LM 1) acrylic crust, beautiful and not easy to break 2) besides the protecting housing, acrylic cover works also as LED lens 3) 90-240 V AC working voltage, 4) run with or without existing ballast/sarter from conventional fluorescent 5) engineered to the best level of light output maintainance 6) using super bright LEDs, 15LM per led 7) lifespan over 50, 000 hours 8) no hazardous materials, Environment-friendly 9) no flickering or RF interference