Ключевые слова: background, bill, blackout, bright, bulb, candles, cash, charge, concept, conservation, cost, crisis, eco, effective, electric, electrical, electricity, energy, expensive, firelight, friendly, future, green, light, lightbulb, money, monthly, necessity, need, night, pay, payment, power, price, pricey, save, savings, source, technology, unplug, utility,