Electricity prices are extraordinarily high, in my experience. Luiz and I do our best to turn off lights, keep the refridgerator door closed, not use the ceiling fans unessesarily (although the big flat screen TV is on nearly 12 hours a day).
Our monthly electric bill is about R$120. But that is relatively good -- our neighbor upstairs is paying well over R$200.
The government is promising a 16% reduction in cost, to spur the economy. Even deeper reductions for businesses.