Ключевые слова: accounting, background, bank, budget, bulb, business, concept, conservation, consumption, control, cost, economical, economy, efficiency, electric, electrical, electricity, energy, expense, expensive, finance, financial, flat, illumination, invention, investment, lay, light, lightbulb, money, object, pay, piggy, piggybank, pink, power, price, profit, save, saving, savings, symbol, tariff, tax, technology, top, view, wealth, yellow,