> How much electricity can plausibly be saved this way?
About third of what was used before.
> And how does that compare to the energy required to reprogram and possibly renew all these signs?
That's cost of doing business and a one-time thing.
About third of what was used before.
> And how does that compare to the energy required to reprogram and possibly renew all these signs?
That's cost of doing business and a one-time thing.
How much is that as a fraction of the total electricity consumption?