Technical Requirements on LED lighting source（1）LED light source chips are required to adopt international brands (CREE U.S.A; Bridgelux; Osram Germany; Philips Netherlands) as well as packing technique of low thermal resistance, well-cooled and low stress.（2）It adopts LED chips with high luminous efficiency which is over 110Lm/w, no ghosting and low degradation. Manufacturer's CO copy is supplied and attached to the bid documents and it should be provided together if there is original CO.(3) The color temperature of light source 4000±50K（4）Lifetime of LED light source: not less than 50000h(Provide relevant evidentiary material)（5）General CRI(Color Rendering Index) of LED street light: Ra≥75; Road evenness is more than 0.4（6）Luminance decrease of LED street light is less than 8% per 10000 hours and service life is more than 50000 hours with luminance decrease less than 30%（7）The bidder needs to make a list clearly in goods detailed instruction form on LED light source brands and specific technical parameters in tender documents. If you have test reports authorized by state authorities, please attach them to bender documents.
