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Do you mean that there are places where street lights with other technologies are replaced with LEDs by leaving every other lamp post empty? That is a problem
by ptaipale 10y ago
Do you mean that there are places where street lights with other technologies are replaced with LEDs by leaving every other lamp post empty?
That is a problem that LEDs could enable (by making very bright lamps available) but is not really a problem of LEDs but a problem of using any bright light source wrongly.
My understanding is that the use of lower-energy and more durable light sources provide most of the incentive to install new lamps. I.e. electricity bill is lower and you need to change the lamps less frequently which reduces maintenance cost.
- jacobolus 10y agoThey rip the poles out, and replace them with fewer new poles (taller, wider spaced, with brighter lamps). This makes the installation cost more attractive to the city. The electricity bill is (potentially) lower if you replace very old lamps with LEDs at the same brightness. The best sodium lamps are quite efficient though, so LEDs have only marginal advantage compared to replacing the old lamps with newer sodium lamps. If you make the LEDs dramatically brighter, then they actually end up using more electricity. I haven’t seen any especially convincing numbers about an LED lamp project that saved on electricity bills. I’m not an expert in the subject though, and I haven’t looked too deeply into digging up data.