type d 2 w led retrofit lamps to be operated in voltage range of 90 v 170 v ac dc to be us ed in the existing bayonet cap holder in place of incandescent bulbs in tl and ac coaches as per icf spec no icf elec 960 rev 0 cs 1 cs 2 cs 3 or latest make brand d square bulon or similar firm s offer d square bulon warranty period 30 months after the date of delivery