60cm,90cm,120cm.150cm T8 To T5 Tube 1)patent light 2)2 years warranty 3)59% ... appearance design, there are ventilation hole in lamp adapter cylinder surface.2.Small tube size, high efficiency, small Lumens depreciation3.Long lifespan ... energy saving up to 63%, immediate return on investment2.The tube life span is 20,000 hours . 2 years warranty3. ... Energy saving 59% 60cm,90cm,120cm.150cm T8 To T5 Tube