Ключевые слова: bulb, cash, coins, cost of light, cost of living, costs, decreases, ecology, economy, ecosustainability, ecosustainable, electric, electricity, electricity costs, energy, energy dependence, energy sources, energy tariffs, eur, expenses, household budget, incandescent, increases, lamp, light, light bulb, lighting, money, ordinary costs, resources, saving, savings, stacks, sustainability, sustainable, tariff, value,