TL;DR
Ability to power lamps via copper wire.What ?
Simply this.Make possible to connect a single lamp to the pole via copper wire as alternative to placing it inside its supply area, but limiting to the wire reach of the pole you're connecting to.
Why ?
- As small feature this is, it would make your base look much more clear in many places removing unnecessary poles you placed just for a single lamp to add. Also providing a clearer look to your light signals or pixel art, idk. One might say just use substation instead, but the cost difference would be huge.
- Being an exception to electricity mechanic it remains balance still, since lamps don't affect any production they simply let you see more clear.