To save energy and provide a much better lighting experience, Delhi Metro has undertaken a massive drive to replace the conventional existing lights (Incandescent Bulbs, Fluorescent Lamps, CFL lamps etc.) with LED lights at 155 locations covering Metro stations, depots, parking etc. which were constructed/opened for public under DMRC’s Phase-I (2005) and Phase-II (2010).
DMRC has already covered 75% of the drive in recent months by installing around one Lakh LED lights at these locations by replacing the conventional lights. Remaining 25% of the drive will be completed by the end of October 2021 wherein around 35000 LED lights will be installed in the remaining portion of these locations.
The operational life of conventional lights, which were installed in Phase-I/II was around ten years. DMRC decided to replace these lights which are well past their effective age now with these new age LED lights which are both cost effective as well as energy efficient. The LED based light system will help DMRC save around half of the energy expenditure vis a vis the existing lighting system. As a result, the whole cost of installing these lights will be recovered by DMRC in around two years time.
The lifespan of LED is long as compared to conventional existing lights with much reduced maintenance cost. The average LED lasts 50,000 operating hours or more. It is more than 40 times of the lifespan of an incandescent bulb. In addition, LED lights have energy efficiency component which makes them consume very low amount of power.
Undertaking this drive in already operational stations was a challenging task for the DMRC maintenance teams. As there is regular movement of people, the work had to be executed in night time due to safety reasons which in turn increased the installation time. Even during night, the work could be carried out for around two hours only in a day since the time window available from the close of last passenger service and commencement of first passenger service is very limited and other important operational preparedness and routine maintenance activities are undertaken in this period only. DMRC had to arrange special scaffoldings and cranes to cover the spaces at twice or thrice the normal height of a building which is again very tricky and a time consuming exercise.
DMRC has already implemented LED based lighting solutions at its Phase-III stations and similar system will be adopted for upcoming Phase-IV stations also.