supply of twin beam head light complete with dc-dc converter, suitable for 24volt halogen l for electric locos one set consists of [i] twin beamhead light assembly. 02 nos./set (supply to be 20 percent of circularshape and 80 percent of elliptical shape) and [ii] dc-dc converter- 01no./set to rdsos spec. no. [1] elrs/spec/pr/0024 (rev.1) sept.04with latest rev. for head light and 2] elrs/spec/dc-dcconverter/0021 (rev.1) sept.04 with latest rev. for converter.specification :- as per description , twin beam head light complete with dc-dc converter, suitable for 24 volt halogen lam p for electric locos one set consists of [i] twin beam head light assembly. 02 nos./set (supply to be 20 percent of circular shape and 80 percent of elliptical shape) and [ii] dc-dc converter- 01 no./set to rdsos spec. no. [1] elrs/spec/pr/0024 (rev.1) sept.04 with latest rev. for head light and 2] elrs/s pec/dc-dc converter/0021 (rev.1) sept.04 with latest rev. for converter.specification :- as per des cription [ warranty period: 30 months after the date of delivery ] ]