installation and maintenance of streetlight installation of streetlight and maintenance , estimate for streetlight replacement and installation , installation and maintenance of 20w branded led street light with bis / isi certification and minimum 2 year warranty output greater than 105 lumen / w 4000-6000 k with ip 66 protection led chip make cree / lumilled / nichea with power factor greater than 0.95 at full load, internal surge protection up to 8 kv and aluminium pressure die-cast powder coated housing, acrylic cover complete with thd less than 10%, power factor greater than 0.98, rohs complaint, duly wired up for use on 230 v ac supply is installed with 25 mm dia with hg company fabricated clamps b class gi pipe bent to shape / cut and welded to shape and fixing the same to post as required at site as the direction of the implementing authority.