Adaptation of heritage street lights
We were invited to the solutions presentation to modernize with current technology (LED) heritage street lights which illuminate monument gardens since the 1920s.
At first, these lights were powered by gas but later they were changed by discharged lamps with equipment. For this, special boxes had to be installed, all of them were provided with lamp holders and the necessary elements for lighting the lamp. It had to be in an upright position with the bushing at the bottom.
This position was determined by the construction of lantern. Because at the manufacture time there wasn’t light distribution concepts. So it wasn’t favorable to the light result.
Our competitors presented as a solution direct current LED bulbs and high power with low performance. From our point of view this was a continuist solution but thrifty. We saw that the light source must be on top of the lantern considering the light structure and inclining the light beam to outside.
Dimensions of lantern were taken for the support design and a sample was made provided with two LED panels for a total of 56W 170-250V 50/60Hz 4000ºK on a tilting support which allows adjustable inclination because there are different combinations of 1,2 and 5 lights on an only streetlight and this would allow us to distribute the light in a different way and adapted in each case.
Once the sample is assembled, we made measurements with a lux meter and we concluded to use 56 and 77W, a better option than 250 and 400W we used before. The sample made in Spain was working a year for 24 hours a day and finally it was approved and installed. We got an important energy saving and a substantial improvement in the night aesthetic of the environment.