... ,20W,27W,28W,30W, 4.Patent product. T5 28W fluorescent lamp Item description:1>Material: light source, control board, adapter, glass ... and rotating 90 degrees then tightening, which can transform the horizontal and vertical holder.3>Surface: Adapter no ventilation hole, it ... .5*28.5mmLuminous Flux: 2800LmFeature:1.Replace the T8 fluorescent lamp directly and energy saving up to 63%, immediate return on ...