... , Super Thin: 13mm thickness b, High PF: over 0.9 c, High Efficiency: over 85% d, 2 year 50W 2800lm led ... Power Factor, the PF is over 0.9c, Contant Current Driver: High Effiency of over 85% d, Warranty: 2 yearse, High ... from 2007. 2) Application: a, Industrial lighting b, Construction illumination c, Indoor decoration illumination of store, shop, window, hotel, dining room ...