Reducing the energy consumption of the street lighting stock / asset is usually one of the big considerations when deciding on how to invest money in to the asset.
You see a trade off - capital investment for the return on revenue savings. Reducing the energy bill and the costs associated with maintaining the asset.
This has caused a big push to replace old lanterns with new LED street lights.
To give an idea how you can estimate the potential savings with an LED replacement scheme we've jotted down below some simple equations you can use to estimate the energy reduction.
Street Light A represents the existing asset and Street Light B represents a possible replacement LED lantern:
Street Light A - 70W SON (90W circuit watts; includes gear etc)
Street Light B - 19W LED (19W circuit watts)