a) Street lights with light sensors on top automatically come on in the middle of the day, generally obviating need for remote control. Remote control is only required for councils more concerned with saving money at 3am than safety of pedestrians.
b) Remote control over the mains is ancient and replaced time switches very long ago. Signalling rate is very low, so reliable.
How long till these are hacked?
There are huge number of daft luminare [sp?] designs out there being used by councils, including uplighters with ineffective reflector hats. Some go more for style than function.
Many are too bright on the pole to look at, whatever the lumens sprayed on the ground are, thus worse for night vision. Bad design of luminare.