Street lamps – replacing sodium lamps with LEDs in the name of efficiency

Municipalities around the world are replacing traditional sodium street lights (yellow) with LED lamps and the main reason for that is assumed better energy efficiency. This argument is repeated over and over and nobody seems to care, even when millions are to be spent on that, but the facts are that sodium lamps are much more energy efficient than LEDs. Is there a way to stop the led insanity? http://en.wikipedia.org/wiki/Luminous_efficacy