4 foot industrial High Bay fluorescent light fixtures 1.CE UL CUL 2.T5-4x14W,T5-4X54W T8-4x32W 4 foot industrial High Bay fluorescent light fixturesSpecificationHousing 0.6 or 0.8mm iron sheet with high quality power coatedFinish rust inhibitor to protect against contamonts and oxidationLouver alanod specular 320G with 86% reflection or Miro4 with 95% reflectionLampholder T5 or T8 VDE or UL ...