... ,21w,28w,35w,54w,49w 3.25000hrs 28w t5 fluorescent fixture Power: HE series:4w,6w,8w,13w,14w,21w ... :1.Material:Aluminium body or Plastic body with PC cover, nice appearance2.Adopt high quality ballast,comply with 3CTUV ... 99%),low THD(<10%)4.Use tri-phosphor powder fluorescent lamp,more brightness,high efficiency5.No noise,no flicker ... ,refrigeratory,show case,hotel,office etc 28w t5 fluorescent fixture