supply of procurement of supply, installation, commissioning and testing of pcb & led module with all assembled items such as screws etc.procurement of supply, installation, commissioning and testing of pcb & led module with all assembled items such as screws etc.,supply, installation, commissioning and testing of pcb & led module with all assembled items su ch as screws, washer, connectors and wires in released defective led type emergency lighting system for self generating conventional ac & non-ac coaches conforming to rdsos specification no. rdso/pe/spec/ac/01 80-2016 (rev.0) type-l with rdso drg. no. rdso/pe/sk/tl/0180-2016 (rev.0) sheet 1 & 2 of different make. required battery will be supplied by railway. [ warranty period: 30 months after the date of delivery ]