supply of supply, installation and commissioning of 24 vdc twin beam led head light , removal of old material and supply, installation and commissioning of 24 vdc twin beam le d head light as per rdso specification rdso/el/spec/0134 (rev03.) details as below : 1. operating voltag e should be nominal 24 v dc, min voltage 22 vdc and maximum working voltage 30 v dc. 2. power consu mption should not be more than 100 watt at nominal operating voltage. 3. reverse polarity test should be operated at opposite 24 v dc supply for 1 minute. 4. bright mode (at a distance of 8 mtr) = 7000 lux (min) and 9000 lux (max) 5. dim mode (at a distance of 8 mtr) = 2500 lux (min) and 3000 lux (max) 6. glass use d for front cover shall be of the heat resistant toughened (ts type) conforming to is: 2553 (part- i). min. thi ckness 4.5mm and transparent of aa quality to is: 2835 and pass ik-05 impact test. 7. mounting arrangem ent of head light should be as per the drawing in rdso specification rdso/2017/el/spec/0134 [ warranty period: 30 months after the date of delivery ] ]