supply of supply of calling on led signal lightingsupply of calling on led signal lighting,supply of calling on led signal lighting unit 110v ac retrofittable in existing cls housing and compatible with ac led ecr as per rdso specification no. rdso/spn/153/2011 (rev.4.1) with latest amen dment. [ warranty period: 30 months after the date of delivery ] ] , supply of route led signal lighting unit with build in current regulator retrofittable in existin g cls unit as per rdso specification no. rdso/spn/153/2011 (rev.4.1) with latest amendment for subsidia ry led signal lighting unit for route signal. [ warranty period: 30 months after the date of delivery ] ] , supply of led signal lighting unit with build in current regulator retrofittable in existing cls u nit as per rdso specification no. rdso/spn/153/2011 (rev.4.1) with latest amendment for subsidiary led signal lighting unit for shunt signal. [ warranty period: 30 months after the date of delivery ] ]