Model: 1 x 28W. 3,T5 bulb,saving 50% power than T8 bulb. 4,Body material: High quality cold-rolled steel plate. 5,Applications: supermarkets,buildings, meeting rooms, exhibition halls,etc. 6,Range of selection: 1 x 14W, 1 x 21W, 1 x 28W. 7,Packing : 50 pcs in one carton.