LED lights were incorporated as part of the upgrade of New Brighton prom earlier this year.
There is a thread about them on here, but I can't remember what it came under.
Quite often, the topic of managed street lighting is mentioned at the same time, usually in the context of street lights being switched off at night.
Something that rarely gets mentioned is a scheme (possibly a pilot or experimental one) that the Council ran around the Magazines area about seven or eight years ago. The lights had a small radio device (costing less than £30, installed) which was attached to the light head, so look for the little antenna on top. The lamp housing itself was changed from the old low pressure sodium type to a modern dimmable one, usually in a 'cobra' style head. This enabled them to be remotely turned on or off, either all together or individually, and allowed for self-reporting of faults. I'm sure that the LED light heads available now would be even more suitable to this kind of treatment.
Similar schemes were tried in other parts of the country. Some schemes included intelligent linking involving movement sensors that could light-up just the required area needed for pedestrians at night. In some cases, the lights 'talked' to each other to achieve this.