supply of 1. red led signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit.2. yellow led signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit.3. green led signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit , red led signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit. [ warranty period: 30 months after the date of delivery ] ] , green led signal lighting units with built in current regulator retrofittable in existing cls u nit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit [ warranty period: 30 months after the date of delivery ] ] , yellow led signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal un it. [ warranty period: 30 months after the date of delivery ] ] , yellow signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit. [ warranty period: 30 months after the date of delivery ] ] , yellow led signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal un it [ warranty period: 30 months after the date of delivery ] ] , green led signal lighting units with built in current regulator retrofittable in existing cls u nit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit [ warranty period: 30 months after the date of delivery ] ] , green signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit. [ wa rranty period: 30 months after the date of delivery ] ] , red led signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit. [ warranty period: 30 months after the date of delivery ] ] , red led signal lighting units with built in current regulator retrofittable in existing cls unit as per rdso specification rdso/spn/199/2025 rev 1.2 with amendment 1 or latest for main signal unit. [ warranty period: 30 months after the date of delivery ] ]