supply of corridor light 4 feet 17 watts +_ 10% led version of old 110 dc 4feet tube light fitting , corridor light 4 feet 17 watts +_ 10% led version of old 110 dc 4feet tube light fitting made of min. 1mm thick m.s or g.i fabricated and powder coated sheet as per new spec.no. clw/es/3/0672 rev. 1 and drawing no. clw/es/3/sk-1/0672 for replacement of old spec.no. clw/es/3/0041 in 3 phase electric l oco. fixtures do not required any alteration in loco led shall be of any brand already approved by clw in s pec. diffuser shall be of 1.5mm thick fire retardant polycarbonate cover with m.s/g.i sheet, powder coated caps on both sides. [ warranty period: 72 months after the date of delivery ] ]