supply of led signal lightingled signal lighting,led signal lighting unit 110v ac for route indicator signal in railway signalling as per r dso/spn/153/2011 rev. 4.1 rdso id -3100194, sub item id-3100194001 [ warranty period: 60 mo nths after the date of delivery ] ] , shunt led signal lighting unit 110v ac as per rdso specification no. rdso/spn/153/20 11 (rev.4.1) or latest retrofittable in existing cls housing (sa; 23840, 23841) and compatible with ac led ecr as rds0 spec. no. sts/relays ac lit led signal/09/2002 or latest. id-3100194, sub item id-3 100194001 [ warranty period: 60 months after the date of delivery ] ] , main led signal lighting unit 110v ac for calling on signal in railway signaling as per rd so/spn/153/2011 (rev. 4.1) or latest. rdso id -3100194, sub item id-3100194001 [ warranty perio d: 60 months after the date of delivery ] ]