... : aluminum alloy frame, AF20 thickness is only 15mm, The width of border: 13.5mm, AF21 thickness is only 10mm, The width ... :13.5mm, AF22 thickness is only 8.86mm, width of border. 2.Saving energy, green: saving 80% than ordinary fluorescent ... . 3.The high light utilization: heating temperature is low, 90% of electricity changed into light energy. 4.New and fashion: the natural ...