Os consumidores acusados de fazerem "gatos" (ligações clandestinas de energia elétrica) se defendem alegando consumirem pouca energia porque possuem apenas um bico de luz, geladeira e televisão.
The residents (of a neighbourhood/street etc) charged with stealing eletricity (from the utility company) counter argument that their comsumption is minimal. Their houses on average have a single lightbulb, a fridge and a television.
The costumers charged with energy theft denied any wrongdoing. They affirmed that their household appliances consisted, on average, of a single lightbulb, a fridge and a television. That would only mean one thing: that their comsumption had to be low.(1)
(1) A second thought here, since that argument could be a weak one, and a counterproductive one. Thus we could change That would only mean one thing: that their comsumption had to be low.
Into That would only mean one thing: that there is no need to steal energy.